4 * Copyright (C) International Business Machines Corp., 2009, 2013
6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
9 * Contains the routines for constructing the SMB2 PDUs themselves
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
27 /* Note that there are handle based routines which must be */
28 /* treated slightly differently for reconnection purposes since we never */
29 /* want to reuse a stale file handle and only the caller knows the file info */
32 #include <linux/kernel.h>
33 #include <linux/vfs.h>
34 #include <linux/task_io_accounting_ops.h>
35 #include <linux/uaccess.h>
36 #include <linux/uuid.h>
37 #include <linux/pagemap.h>
38 #include <linux/xattr.h>
42 #include "cifsproto.h"
43 #include "smb2proto.h"
44 #include "cifs_unicode.h"
45 #include "cifs_debug.h"
47 #include "smb2status.h"
50 #include "cifs_spnego.h"
51 #include "smbdirect.h"
55 * The following table defines the expected "StructureSize" of SMB2 requests
56 * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests.
58 * Note that commands are defined in smb2pdu.h in le16 but the array below is
59 * indexed by command in host byte order.
61 static const int smb2_req_struct_sizes
[NUMBER_OF_SMB2_COMMANDS
] = {
62 /* SMB2_NEGOTIATE */ 36,
63 /* SMB2_SESSION_SETUP */ 25,
65 /* SMB2_TREE_CONNECT */ 9,
66 /* SMB2_TREE_DISCONNECT */ 4,
76 /* SMB2_QUERY_DIRECTORY */ 33,
77 /* SMB2_CHANGE_NOTIFY */ 32,
78 /* SMB2_QUERY_INFO */ 41,
79 /* SMB2_SET_INFO */ 33,
80 /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
83 static int smb3_encryption_required(const struct cifs_tcon
*tcon
)
87 if ((tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
) ||
88 (tcon
->share_flags
& SHI1005_FLAGS_ENCRYPT_DATA
))
91 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
97 smb2_hdr_assemble(struct smb2_sync_hdr
*shdr
, __le16 smb2_cmd
,
98 const struct cifs_tcon
*tcon
)
100 shdr
->ProtocolId
= SMB2_PROTO_NUMBER
;
101 shdr
->StructureSize
= cpu_to_le16(64);
102 shdr
->Command
= smb2_cmd
;
103 if (tcon
&& tcon
->ses
&& tcon
->ses
->server
) {
104 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
106 spin_lock(&server
->req_lock
);
107 /* Request up to 2 credits but don't go over the limit. */
108 if (server
->credits
>= server
->max_credits
)
109 shdr
->CreditRequest
= cpu_to_le16(0);
111 shdr
->CreditRequest
= cpu_to_le16(
112 min_t(int, server
->max_credits
-
113 server
->credits
, 2));
114 spin_unlock(&server
->req_lock
);
116 shdr
->CreditRequest
= cpu_to_le16(2);
118 shdr
->ProcessId
= cpu_to_le32((__u16
)current
->tgid
);
123 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
124 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
125 if ((tcon
->ses
) && (tcon
->ses
->server
) &&
126 (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LARGE_MTU
))
127 shdr
->CreditCharge
= cpu_to_le16(1);
128 /* else CreditCharge MBZ */
130 shdr
->TreeId
= tcon
->tid
;
131 /* Uid is not converted */
133 shdr
->SessionId
= tcon
->ses
->Suid
;
136 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
137 * to pass the path on the Open SMB prefixed by \\server\share.
138 * Not sure when we would need to do the augmented path (if ever) and
139 * setting this flag breaks the SMB2 open operation since it is
140 * illegal to send an empty path name (without \\server\share prefix)
141 * when the DFS flag is set in the SMB open header. We could
142 * consider setting the flag on all operations other than open
143 * but it is safer to net set it for now.
145 /* if (tcon->share_flags & SHI1005_FLAGS_DFS)
146 shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
148 if (tcon
->ses
&& tcon
->ses
->server
&& tcon
->ses
->server
->sign
&&
149 !smb3_encryption_required(tcon
))
150 shdr
->Flags
|= SMB2_FLAGS_SIGNED
;
156 smb2_reconnect(__le16 smb2_command
, struct cifs_tcon
*tcon
)
159 struct nls_table
*nls_codepage
;
160 struct cifs_ses
*ses
;
161 struct TCP_Server_Info
*server
;
164 * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so
165 * check for tcp and smb session status done differently
166 * for those three - in the calling routine.
171 if (smb2_command
== SMB2_TREE_CONNECT
)
174 if (tcon
->tidStatus
== CifsExiting
) {
176 * only tree disconnect, open, and write,
177 * (and ulogoff which does not have tcon)
178 * are allowed as we start force umount.
180 if ((smb2_command
!= SMB2_WRITE
) &&
181 (smb2_command
!= SMB2_CREATE
) &&
182 (smb2_command
!= SMB2_TREE_DISCONNECT
)) {
183 cifs_dbg(FYI
, "can not send cmd %d while umounting\n",
188 if ((!tcon
->ses
) || (tcon
->ses
->status
== CifsExiting
) ||
189 (!tcon
->ses
->server
))
193 server
= ses
->server
;
196 * Give demultiplex thread up to 10 seconds to reconnect, should be
197 * greater than cifs socket timeout which is 7 seconds
199 while (server
->tcpStatus
== CifsNeedReconnect
) {
201 * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE
202 * here since they are implicitly done when session drops.
204 switch (smb2_command
) {
206 * BB Should we keep oplock break and add flush to exceptions?
208 case SMB2_TREE_DISCONNECT
:
211 case SMB2_OPLOCK_BREAK
:
215 rc
= wait_event_interruptible_timeout(server
->response_q
,
216 (server
->tcpStatus
!= CifsNeedReconnect
),
219 cifs_dbg(FYI
, "%s: aborting reconnect due to a received"
220 " signal by the process\n", __func__
);
224 /* are we still trying to reconnect? */
225 if (server
->tcpStatus
!= CifsNeedReconnect
)
229 * on "soft" mounts we wait once. Hard mounts keep
230 * retrying until process is killed or server comes
234 cifs_dbg(FYI
, "gave up waiting on reconnect in smb_init\n");
239 if (!tcon
->ses
->need_reconnect
&& !tcon
->need_reconnect
)
242 nls_codepage
= load_nls_default();
245 * need to prevent multiple threads trying to simultaneously reconnect
246 * the same SMB session
248 mutex_lock(&tcon
->ses
->session_mutex
);
251 * Recheck after acquire mutex. If another thread is negotiating
252 * and the server never sends an answer the socket will be closed
253 * and tcpStatus set to reconnect.
255 if (server
->tcpStatus
== CifsNeedReconnect
) {
257 mutex_unlock(&tcon
->ses
->session_mutex
);
261 rc
= cifs_negotiate_protocol(0, tcon
->ses
);
262 if (!rc
&& tcon
->ses
->need_reconnect
)
263 rc
= cifs_setup_session(0, tcon
->ses
, nls_codepage
);
265 if (rc
|| !tcon
->need_reconnect
) {
266 mutex_unlock(&tcon
->ses
->session_mutex
);
270 cifs_mark_open_files_invalid(tcon
);
271 if (tcon
->use_persistent
)
272 tcon
->need_reopen_files
= true;
274 rc
= SMB2_tcon(0, tcon
->ses
, tcon
->treeName
, tcon
, nls_codepage
);
275 mutex_unlock(&tcon
->ses
->session_mutex
);
277 cifs_dbg(FYI
, "reconnect tcon rc = %d\n", rc
);
279 /* If sess reconnected but tcon didn't, something strange ... */
280 printk_once(KERN_WARNING
"reconnect tcon failed rc = %d\n", rc
);
284 if (smb2_command
!= SMB2_INTERNAL_CMD
)
285 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
287 atomic_inc(&tconInfoReconnectCount
);
290 * Check if handle based operation so we know whether we can continue
291 * or not without returning to caller to reset file handle.
294 * BB Is flush done by server on drop of tcp session? Should we special
295 * case it and skip above?
297 switch (smb2_command
) {
303 case SMB2_QUERY_DIRECTORY
:
304 case SMB2_CHANGE_NOTIFY
:
305 case SMB2_QUERY_INFO
:
309 unload_nls(nls_codepage
);
314 fill_small_buf(__le16 smb2_command
, struct cifs_tcon
*tcon
, void *buf
,
315 unsigned int *total_len
)
317 struct smb2_sync_pdu
*spdu
= (struct smb2_sync_pdu
*)buf
;
318 /* lookup word count ie StructureSize from table */
319 __u16 parmsize
= smb2_req_struct_sizes
[le16_to_cpu(smb2_command
)];
322 * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
323 * largest operations (Create)
327 smb2_hdr_assemble(&spdu
->sync_hdr
, smb2_command
, tcon
);
328 spdu
->StructureSize2
= cpu_to_le16(parmsize
);
330 *total_len
= parmsize
+ sizeof(struct smb2_sync_hdr
);
334 * Allocate and return pointer to an SMB request hdr, and set basic
335 * SMB information in the SMB header. If the return code is zero, this
336 * function must have filled in request_buf pointer.
339 smb2_plain_req_init(__le16 smb2_command
, struct cifs_tcon
*tcon
,
340 void **request_buf
, unsigned int *total_len
)
344 rc
= smb2_reconnect(smb2_command
, tcon
);
348 /* BB eventually switch this to SMB2 specific small buf size */
349 if (smb2_command
== SMB2_SET_INFO
)
350 *request_buf
= cifs_buf_get();
352 *request_buf
= cifs_small_buf_get();
353 if (*request_buf
== NULL
) {
354 /* BB should we add a retry in here if not a writepage? */
358 fill_small_buf(smb2_command
, tcon
,
359 (struct smb2_sync_hdr
*)(*request_buf
),
363 uint16_t com_code
= le16_to_cpu(smb2_command
);
364 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_sent
[com_code
]);
365 cifs_stats_inc(&tcon
->num_smbs_sent
);
372 /* offset is sizeof smb2_negotiate_req but rounded up to 8 bytes */
373 #define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) */
376 #define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
377 #define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
378 #define SMB2_POSIX_EXTENSIONS_AVAILABLE cpu_to_le16(0x100)
381 build_preauth_ctxt(struct smb2_preauth_neg_context
*pneg_ctxt
)
383 pneg_ctxt
->ContextType
= SMB2_PREAUTH_INTEGRITY_CAPABILITIES
;
384 pneg_ctxt
->DataLength
= cpu_to_le16(38);
385 pneg_ctxt
->HashAlgorithmCount
= cpu_to_le16(1);
386 pneg_ctxt
->SaltLength
= cpu_to_le16(SMB311_SALT_SIZE
);
387 get_random_bytes(pneg_ctxt
->Salt
, SMB311_SALT_SIZE
);
388 pneg_ctxt
->HashAlgorithms
= SMB2_PREAUTH_INTEGRITY_SHA512
;
392 build_encrypt_ctxt(struct smb2_encryption_neg_context
*pneg_ctxt
)
394 pneg_ctxt
->ContextType
= SMB2_ENCRYPTION_CAPABILITIES
;
395 pneg_ctxt
->DataLength
= cpu_to_le16(4); /* Cipher Count + le16 cipher */
396 pneg_ctxt
->CipherCount
= cpu_to_le16(1);
397 /* pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;*/ /* not supported yet */
398 pneg_ctxt
->Ciphers
[0] = SMB2_ENCRYPTION_AES128_CCM
;
402 build_posix_ctxt(struct smb2_posix_neg_context
*pneg_ctxt
)
404 pneg_ctxt
->ContextType
= SMB2_POSIX_EXTENSIONS_AVAILABLE
;
405 pneg_ctxt
->DataLength
= cpu_to_le16(POSIX_CTXT_DATA_LEN
);
409 assemble_neg_contexts(struct smb2_negotiate_req
*req
,
410 unsigned int *total_len
)
412 char *pneg_ctxt
= (char *)req
+ OFFSET_OF_NEG_CONTEXT
;
413 unsigned int ctxt_len
;
415 *total_len
+= 2; /* Add 2 due to round to 8 byte boundary for 1st ctxt */
416 build_preauth_ctxt((struct smb2_preauth_neg_context
*)pneg_ctxt
);
417 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_preauth_neg_context
), 8) * 8;
418 *total_len
+= ctxt_len
;
419 pneg_ctxt
+= ctxt_len
;
421 build_encrypt_ctxt((struct smb2_encryption_neg_context
*)pneg_ctxt
);
422 ctxt_len
= DIV_ROUND_UP(sizeof(struct smb2_encryption_neg_context
), 8) * 8;
423 *total_len
+= ctxt_len
;
424 pneg_ctxt
+= ctxt_len
;
426 build_posix_ctxt((struct smb2_posix_neg_context
*)pneg_ctxt
);
427 *total_len
+= sizeof(struct smb2_posix_neg_context
);
429 req
->NegotiateContextOffset
= cpu_to_le32(OFFSET_OF_NEG_CONTEXT
);
430 req
->NegotiateContextCount
= cpu_to_le16(3);
433 static void decode_preauth_context(struct smb2_preauth_neg_context
*ctxt
)
435 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
437 /* If invalid preauth context warn but use what we requested, SHA-512 */
438 if (len
< MIN_PREAUTH_CTXT_DATA_LEN
) {
439 printk_once(KERN_WARNING
"server sent bad preauth context\n");
442 if (le16_to_cpu(ctxt
->HashAlgorithmCount
) != 1)
443 printk_once(KERN_WARNING
"illegal SMB3 hash algorithm count\n");
444 if (ctxt
->HashAlgorithms
!= SMB2_PREAUTH_INTEGRITY_SHA512
)
445 printk_once(KERN_WARNING
"unknown SMB3 hash algorithm\n");
448 static int decode_encrypt_ctx(struct TCP_Server_Info
*server
,
449 struct smb2_encryption_neg_context
*ctxt
)
451 unsigned int len
= le16_to_cpu(ctxt
->DataLength
);
453 cifs_dbg(FYI
, "decode SMB3.11 encryption neg context of len %d\n", len
);
454 if (len
< MIN_ENCRYPT_CTXT_DATA_LEN
) {
455 printk_once(KERN_WARNING
"server sent bad crypto ctxt len\n");
459 if (le16_to_cpu(ctxt
->CipherCount
) != 1) {
460 printk_once(KERN_WARNING
"illegal SMB3.11 cipher count\n");
463 cifs_dbg(FYI
, "SMB311 cipher type:%d\n", le16_to_cpu(ctxt
->Ciphers
[0]));
464 if ((ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_CCM
) &&
465 (ctxt
->Ciphers
[0] != SMB2_ENCRYPTION_AES128_GCM
)) {
466 printk_once(KERN_WARNING
"invalid SMB3.11 cipher returned\n");
469 server
->cipher_type
= ctxt
->Ciphers
[0];
470 server
->capabilities
|= SMB2_GLOBAL_CAP_ENCRYPTION
;
474 static int smb311_decode_neg_context(struct smb2_negotiate_rsp
*rsp
,
475 struct TCP_Server_Info
*server
,
476 unsigned int len_of_smb
)
478 struct smb2_neg_context
*pctx
;
479 unsigned int offset
= le32_to_cpu(rsp
->NegotiateContextOffset
);
480 unsigned int ctxt_cnt
= le16_to_cpu(rsp
->NegotiateContextCount
);
481 unsigned int len_of_ctxts
, i
;
484 cifs_dbg(FYI
, "decoding %d negotiate contexts\n", ctxt_cnt
);
485 if (len_of_smb
<= offset
) {
486 cifs_dbg(VFS
, "Invalid response: negotiate context offset\n");
490 len_of_ctxts
= len_of_smb
- offset
;
492 for (i
= 0; i
< ctxt_cnt
; i
++) {
494 /* check that offset is not beyond end of SMB */
495 if (len_of_ctxts
== 0)
498 if (len_of_ctxts
< sizeof(struct smb2_neg_context
))
501 pctx
= (struct smb2_neg_context
*)(offset
+ (char *)rsp
);
502 clen
= le16_to_cpu(pctx
->DataLength
);
503 if (clen
> len_of_ctxts
)
506 if (pctx
->ContextType
== SMB2_PREAUTH_INTEGRITY_CAPABILITIES
)
507 decode_preauth_context(
508 (struct smb2_preauth_neg_context
*)pctx
);
509 else if (pctx
->ContextType
== SMB2_ENCRYPTION_CAPABILITIES
)
510 rc
= decode_encrypt_ctx(server
,
511 (struct smb2_encryption_neg_context
*)pctx
);
512 else if (pctx
->ContextType
== SMB2_POSIX_EXTENSIONS_AVAILABLE
)
513 server
->posix_ext_supported
= true;
515 cifs_dbg(VFS
, "unknown negcontext of type %d ignored\n",
516 le16_to_cpu(pctx
->ContextType
));
520 /* offsets must be 8 byte aligned */
521 clen
= (clen
+ 7) & ~0x7;
522 offset
+= clen
+ sizeof(struct smb2_neg_context
);
523 len_of_ctxts
-= clen
;
528 static struct create_posix
*
529 create_posix_buf(umode_t mode
)
531 struct create_posix
*buf
;
533 buf
= kzalloc(sizeof(struct create_posix
),
538 buf
->ccontext
.DataOffset
=
539 cpu_to_le16(offsetof(struct create_posix
, Mode
));
540 buf
->ccontext
.DataLength
= cpu_to_le32(4);
541 buf
->ccontext
.NameOffset
=
542 cpu_to_le16(offsetof(struct create_posix
, Name
));
543 buf
->ccontext
.NameLength
= cpu_to_le16(16);
545 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
556 buf
->Name
[10] = 0x83;
557 buf
->Name
[11] = 0xDE;
558 buf
->Name
[12] = 0x96;
559 buf
->Name
[13] = 0x8B;
560 buf
->Name
[14] = 0xCD;
561 buf
->Name
[15] = 0x7C;
562 buf
->Mode
= cpu_to_le32(mode
);
563 cifs_dbg(FYI
, "mode on posix create 0%o", mode
);
568 add_posix_context(struct kvec
*iov
, unsigned int *num_iovec
, umode_t mode
)
570 struct smb2_create_req
*req
= iov
[0].iov_base
;
571 unsigned int num
= *num_iovec
;
573 iov
[num
].iov_base
= create_posix_buf(mode
);
574 if (iov
[num
].iov_base
== NULL
)
576 iov
[num
].iov_len
= sizeof(struct create_posix
);
577 if (!req
->CreateContextsOffset
)
578 req
->CreateContextsOffset
= cpu_to_le32(
579 sizeof(struct smb2_create_req
) +
580 iov
[num
- 1].iov_len
);
581 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_posix
));
582 *num_iovec
= num
+ 1;
589 * SMB2 Worker functions follow:
591 * The general structure of the worker functions is:
592 * 1) Call smb2_init (assembles SMB2 header)
593 * 2) Initialize SMB2 command specific fields in fixed length area of SMB
594 * 3) Call smb_sendrcv2 (sends request on socket and waits for response)
595 * 4) Decode SMB2 command specific fields in the fixed length area
596 * 5) Decode variable length data area (if any for this SMB2 command type)
597 * 6) Call free smb buffer
603 SMB2_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
605 struct smb_rqst rqst
;
606 struct smb2_negotiate_req
*req
;
607 struct smb2_negotiate_rsp
*rsp
;
612 struct TCP_Server_Info
*server
= ses
->server
;
613 int blob_offset
, blob_length
;
615 int flags
= CIFS_NEG_OP
;
616 unsigned int total_len
;
618 cifs_dbg(FYI
, "Negotiate protocol\n");
621 WARN(1, "%s: server is NULL!\n", __func__
);
625 rc
= smb2_plain_req_init(SMB2_NEGOTIATE
, NULL
, (void **) &req
, &total_len
);
629 req
->sync_hdr
.SessionId
= 0;
631 memset(server
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
632 memset(ses
->preauth_sha_hash
, 0, SMB2_PREAUTH_HASH_SIZE
);
634 if (strcmp(ses
->server
->vals
->version_string
,
635 SMB3ANY_VERSION_STRING
) == 0) {
636 req
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
637 req
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
638 req
->DialectCount
= cpu_to_le16(2);
640 } else if (strcmp(ses
->server
->vals
->version_string
,
641 SMBDEFAULT_VERSION_STRING
) == 0) {
642 req
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
643 req
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
644 req
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
645 req
->DialectCount
= cpu_to_le16(3);
648 /* otherwise send specific dialect */
649 req
->Dialects
[0] = cpu_to_le16(ses
->server
->vals
->protocol_id
);
650 req
->DialectCount
= cpu_to_le16(1);
654 /* only one of SMB2 signing flags may be set in SMB2 request */
656 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
657 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
658 req
->SecurityMode
= cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
660 req
->SecurityMode
= 0;
662 req
->Capabilities
= cpu_to_le32(ses
->server
->vals
->req_capabilities
);
664 /* ClientGUID must be zero for SMB2.02 dialect */
665 if (ses
->server
->vals
->protocol_id
== SMB20_PROT_ID
)
666 memset(req
->ClientGUID
, 0, SMB2_CLIENT_GUID_SIZE
);
668 memcpy(req
->ClientGUID
, server
->client_guid
,
669 SMB2_CLIENT_GUID_SIZE
);
670 if (ses
->server
->vals
->protocol_id
== SMB311_PROT_ID
)
671 assemble_neg_contexts(req
, &total_len
);
673 iov
[0].iov_base
= (char *)req
;
674 iov
[0].iov_len
= total_len
;
676 memset(&rqst
, 0, sizeof(struct smb_rqst
));
680 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
681 cifs_small_buf_release(req
);
682 rsp
= (struct smb2_negotiate_rsp
*)rsp_iov
.iov_base
;
684 * No tcon so can't do
685 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
687 if (rc
== -EOPNOTSUPP
) {
688 cifs_dbg(VFS
, "Dialect not supported by server. Consider "
689 "specifying vers=1.0 or vers=2.0 on mount for accessing"
695 if (strcmp(ses
->server
->vals
->version_string
,
696 SMB3ANY_VERSION_STRING
) == 0) {
697 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
699 "SMB2 dialect returned but not requested\n");
701 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
703 "SMB2.1 dialect returned but not requested\n");
706 } else if (strcmp(ses
->server
->vals
->version_string
,
707 SMBDEFAULT_VERSION_STRING
) == 0) {
708 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
)) {
710 "SMB2 dialect returned but not requested\n");
712 } else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
)) {
713 /* ops set to 3.0 by default for default so update */
714 ses
->server
->ops
= &smb21_operations
;
716 } else if (le16_to_cpu(rsp
->DialectRevision
) !=
717 ses
->server
->vals
->protocol_id
) {
718 /* if requested single dialect ensure returned dialect matched */
719 cifs_dbg(VFS
, "Illegal 0x%x dialect returned: not requested\n",
720 le16_to_cpu(rsp
->DialectRevision
));
724 cifs_dbg(FYI
, "mode 0x%x\n", rsp
->SecurityMode
);
726 if (rsp
->DialectRevision
== cpu_to_le16(SMB20_PROT_ID
))
727 cifs_dbg(FYI
, "negotiated smb2.0 dialect\n");
728 else if (rsp
->DialectRevision
== cpu_to_le16(SMB21_PROT_ID
))
729 cifs_dbg(FYI
, "negotiated smb2.1 dialect\n");
730 else if (rsp
->DialectRevision
== cpu_to_le16(SMB30_PROT_ID
))
731 cifs_dbg(FYI
, "negotiated smb3.0 dialect\n");
732 else if (rsp
->DialectRevision
== cpu_to_le16(SMB302_PROT_ID
))
733 cifs_dbg(FYI
, "negotiated smb3.02 dialect\n");
734 else if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
))
735 cifs_dbg(FYI
, "negotiated smb3.1.1 dialect\n");
737 cifs_dbg(VFS
, "Illegal dialect returned by server 0x%x\n",
738 le16_to_cpu(rsp
->DialectRevision
));
742 server
->dialect
= le16_to_cpu(rsp
->DialectRevision
);
745 * Keep a copy of the hash after negprot. This hash will be
746 * the starting hash value for all sessions made from this
749 memcpy(server
->preauth_sha_hash
, ses
->preauth_sha_hash
,
750 SMB2_PREAUTH_HASH_SIZE
);
752 /* SMB2 only has an extended negflavor */
753 server
->negflavor
= CIFS_NEGFLAVOR_EXTENDED
;
754 /* set it to the maximum buffer size value we can send with 1 credit */
755 server
->maxBuf
= min_t(unsigned int, le32_to_cpu(rsp
->MaxTransactSize
),
756 SMB2_MAX_BUFFER_SIZE
);
757 server
->max_read
= le32_to_cpu(rsp
->MaxReadSize
);
758 server
->max_write
= le32_to_cpu(rsp
->MaxWriteSize
);
759 server
->sec_mode
= le16_to_cpu(rsp
->SecurityMode
);
760 if ((server
->sec_mode
& SMB2_SEC_MODE_FLAGS_ALL
) != server
->sec_mode
)
761 cifs_dbg(FYI
, "Server returned unexpected security mode 0x%x\n",
763 server
->capabilities
= le32_to_cpu(rsp
->Capabilities
);
765 server
->capabilities
|= SMB2_NT_FIND
| SMB2_LARGE_FILES
;
767 security_blob
= smb2_get_data_area_len(&blob_offset
, &blob_length
,
768 (struct smb2_sync_hdr
*)rsp
);
770 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
772 * ses->sectype = RawNTLMSSP;
773 * but for time being this is our only auth choice so doesn't matter.
774 * We just found a server which sets blob length to zero expecting raw.
776 if (blob_length
== 0) {
777 cifs_dbg(FYI
, "missing security blob on negprot\n");
778 server
->sec_ntlmssp
= true;
781 rc
= cifs_enable_signing(server
, ses
->sign
);
785 rc
= decode_negTokenInit(security_blob
, blob_length
, server
);
792 if (rsp
->DialectRevision
== cpu_to_le16(SMB311_PROT_ID
)) {
793 if (rsp
->NegotiateContextCount
)
794 rc
= smb311_decode_neg_context(rsp
, server
,
797 cifs_dbg(VFS
, "Missing expected negotiate contexts\n");
800 free_rsp_buf(resp_buftype
, rsp
);
804 int smb3_validate_negotiate(const unsigned int xid
, struct cifs_tcon
*tcon
)
807 struct validate_negotiate_info_req
*pneg_inbuf
;
808 struct validate_negotiate_info_rsp
*pneg_rsp
= NULL
;
810 u32 inbuflen
; /* max of 4 dialects */
812 cifs_dbg(FYI
, "validate negotiate\n");
814 /* In SMB3.11 preauth integrity supersedes validate negotiate */
815 if (tcon
->ses
->server
->dialect
== SMB311_PROT_ID
)
819 * validation ioctl must be signed, so no point sending this if we
820 * can not sign it (ie are not known user). Even if signing is not
821 * required (enabled but not negotiated), in those cases we selectively
822 * sign just this, the first and only signed request on a connection.
823 * Having validation of negotiate info helps reduce attack vectors.
825 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
)
826 return 0; /* validation requires signing */
828 if (tcon
->ses
->user_name
== NULL
) {
829 cifs_dbg(FYI
, "Can't validate negotiate: null user mount\n");
830 return 0; /* validation requires signing */
833 if (tcon
->ses
->session_flags
& SMB2_SESSION_FLAG_IS_NULL
)
834 cifs_dbg(VFS
, "Unexpected null user (anonymous) auth flag sent by server\n");
836 pneg_inbuf
= kmalloc(sizeof(*pneg_inbuf
), GFP_NOFS
);
840 pneg_inbuf
->Capabilities
=
841 cpu_to_le32(tcon
->ses
->server
->vals
->req_capabilities
);
842 memcpy(pneg_inbuf
->Guid
, tcon
->ses
->server
->client_guid
,
843 SMB2_CLIENT_GUID_SIZE
);
846 pneg_inbuf
->SecurityMode
=
847 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED
);
848 else if (global_secflags
& CIFSSEC_MAY_SIGN
)
849 pneg_inbuf
->SecurityMode
=
850 cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED
);
852 pneg_inbuf
->SecurityMode
= 0;
855 if (strcmp(tcon
->ses
->server
->vals
->version_string
,
856 SMB3ANY_VERSION_STRING
) == 0) {
857 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB30_PROT_ID
);
858 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB302_PROT_ID
);
859 pneg_inbuf
->DialectCount
= cpu_to_le16(2);
860 /* structure is big enough for 3 dialects, sending only 2 */
861 inbuflen
= sizeof(*pneg_inbuf
) -
862 sizeof(pneg_inbuf
->Dialects
[0]);
863 } else if (strcmp(tcon
->ses
->server
->vals
->version_string
,
864 SMBDEFAULT_VERSION_STRING
) == 0) {
865 pneg_inbuf
->Dialects
[0] = cpu_to_le16(SMB21_PROT_ID
);
866 pneg_inbuf
->Dialects
[1] = cpu_to_le16(SMB30_PROT_ID
);
867 pneg_inbuf
->Dialects
[2] = cpu_to_le16(SMB302_PROT_ID
);
868 pneg_inbuf
->DialectCount
= cpu_to_le16(3);
869 /* structure is big enough for 3 dialects */
870 inbuflen
= sizeof(*pneg_inbuf
);
872 /* otherwise specific dialect was requested */
873 pneg_inbuf
->Dialects
[0] =
874 cpu_to_le16(tcon
->ses
->server
->vals
->protocol_id
);
875 pneg_inbuf
->DialectCount
= cpu_to_le16(1);
876 /* structure is big enough for 3 dialects, sending only 1 */
877 inbuflen
= sizeof(*pneg_inbuf
) -
878 sizeof(pneg_inbuf
->Dialects
[0]) * 2;
881 rc
= SMB2_ioctl(xid
, tcon
, NO_FILE_ID
, NO_FILE_ID
,
882 FSCTL_VALIDATE_NEGOTIATE_INFO
, true /* is_fsctl */,
883 (char *)pneg_inbuf
, inbuflen
, (char **)&pneg_rsp
, &rsplen
);
886 cifs_dbg(VFS
, "validate protocol negotiate failed: %d\n", rc
);
892 if (rsplen
!= sizeof(*pneg_rsp
)) {
893 cifs_dbg(VFS
, "invalid protocol negotiate response size: %d\n",
896 /* relax check since Mac returns max bufsize allowed on ioctl */
897 if (rsplen
> CIFSMaxBufSize
|| rsplen
< sizeof(*pneg_rsp
))
901 /* check validate negotiate info response matches what we got earlier */
902 if (pneg_rsp
->Dialect
!= cpu_to_le16(tcon
->ses
->server
->dialect
))
905 if (pneg_rsp
->SecurityMode
!= cpu_to_le16(tcon
->ses
->server
->sec_mode
))
908 /* do not validate server guid because not saved at negprot time yet */
910 if ((le32_to_cpu(pneg_rsp
->Capabilities
) | SMB2_NT_FIND
|
911 SMB2_LARGE_FILES
) != tcon
->ses
->server
->capabilities
)
914 /* validate negotiate successful */
916 cifs_dbg(FYI
, "validate negotiate info successful\n");
920 cifs_dbg(VFS
, "protocol revalidation - security settings mismatch\n");
929 smb2_select_sectype(struct TCP_Server_Info
*server
, enum securityEnum requested
)
938 if (server
->sec_ntlmssp
&&
939 (global_secflags
& CIFSSEC_MAY_NTLMSSP
))
941 if ((server
->sec_kerberos
|| server
->sec_mskerberos
) &&
942 (global_secflags
& CIFSSEC_MAY_KRB5
))
950 struct SMB2_sess_data
{
952 struct cifs_ses
*ses
;
953 struct nls_table
*nls_cp
;
954 void (*func
)(struct SMB2_sess_data
*);
956 u64 previous_session
;
958 /* we will send the SMB in three pieces:
959 * a fixed length beginning part, an optional
960 * SPNEGO blob (which can be zero length), and a
961 * last part which will include the strings
962 * and rest of bcc area. This allows us to avoid
963 * a large buffer 17K allocation
970 SMB2_sess_alloc_buffer(struct SMB2_sess_data
*sess_data
)
973 struct cifs_ses
*ses
= sess_data
->ses
;
974 struct smb2_sess_setup_req
*req
;
975 struct TCP_Server_Info
*server
= ses
->server
;
976 unsigned int total_len
;
978 rc
= smb2_plain_req_init(SMB2_SESSION_SETUP
, NULL
, (void **) &req
,
983 /* First session, not a reauthenticate */
984 req
->sync_hdr
.SessionId
= 0;
986 /* if reconnect, we need to send previous sess id, otherwise it is 0 */
987 req
->PreviousSessionId
= sess_data
->previous_session
;
989 req
->Flags
= 0; /* MBZ */
991 /* enough to enable echos and oplocks and one max size write */
992 req
->sync_hdr
.CreditRequest
= cpu_to_le16(130);
994 /* only one of SMB2 signing flags may be set in SMB2 request */
996 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_REQUIRED
;
997 else if (global_secflags
& CIFSSEC_MAY_SIGN
) /* one flag unlike MUST_ */
998 req
->SecurityMode
= SMB2_NEGOTIATE_SIGNING_ENABLED
;
1000 req
->SecurityMode
= 0;
1002 req
->Capabilities
= 0;
1003 req
->Channel
= 0; /* MBZ */
1005 sess_data
->iov
[0].iov_base
= (char *)req
;
1007 sess_data
->iov
[0].iov_len
= total_len
- 1;
1009 * This variable will be used to clear the buffer
1010 * allocated above in case of any error in the calling function.
1012 sess_data
->buf0_type
= CIFS_SMALL_BUFFER
;
1018 SMB2_sess_free_buffer(struct SMB2_sess_data
*sess_data
)
1020 free_rsp_buf(sess_data
->buf0_type
, sess_data
->iov
[0].iov_base
);
1021 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1025 SMB2_sess_sendreceive(struct SMB2_sess_data
*sess_data
)
1028 struct smb_rqst rqst
;
1029 struct smb2_sess_setup_req
*req
= sess_data
->iov
[0].iov_base
;
1030 struct kvec rsp_iov
= { NULL
, 0 };
1032 /* Testing shows that buffer offset must be at location of Buffer[0] */
1033 req
->SecurityBufferOffset
=
1034 cpu_to_le16(sizeof(struct smb2_sess_setup_req
) - 1 /* pad */);
1035 req
->SecurityBufferLength
= cpu_to_le16(sess_data
->iov
[1].iov_len
);
1037 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1038 rqst
.rq_iov
= sess_data
->iov
;
1041 /* BB add code to build os and lm fields */
1042 rc
= cifs_send_recv(sess_data
->xid
, sess_data
->ses
,
1044 &sess_data
->buf0_type
,
1045 CIFS_LOG_ERROR
| CIFS_NEG_OP
, &rsp_iov
);
1046 cifs_small_buf_release(sess_data
->iov
[0].iov_base
);
1047 memcpy(&sess_data
->iov
[0], &rsp_iov
, sizeof(struct kvec
));
1053 SMB2_sess_establish_session(struct SMB2_sess_data
*sess_data
)
1056 struct cifs_ses
*ses
= sess_data
->ses
;
1058 mutex_lock(&ses
->server
->srv_mutex
);
1059 if (ses
->server
->ops
->generate_signingkey
) {
1060 rc
= ses
->server
->ops
->generate_signingkey(ses
);
1063 "SMB3 session key generation failed\n");
1064 mutex_unlock(&ses
->server
->srv_mutex
);
1068 if (!ses
->server
->session_estab
) {
1069 ses
->server
->sequence_number
= 0x2;
1070 ses
->server
->session_estab
= true;
1072 mutex_unlock(&ses
->server
->srv_mutex
);
1074 cifs_dbg(FYI
, "SMB2/3 session established successfully\n");
1075 spin_lock(&GlobalMid_Lock
);
1076 ses
->status
= CifsGood
;
1077 ses
->need_reconnect
= false;
1078 spin_unlock(&GlobalMid_Lock
);
1082 #ifdef CONFIG_CIFS_UPCALL
1084 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1087 struct cifs_ses
*ses
= sess_data
->ses
;
1088 struct cifs_spnego_msg
*msg
;
1089 struct key
*spnego_key
= NULL
;
1090 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1092 rc
= SMB2_sess_alloc_buffer(sess_data
);
1096 spnego_key
= cifs_get_spnego_key(ses
);
1097 if (IS_ERR(spnego_key
)) {
1098 rc
= PTR_ERR(spnego_key
);
1103 msg
= spnego_key
->payload
.data
[0];
1105 * check version field to make sure that cifs.upcall is
1106 * sending us a response in an expected form
1108 if (msg
->version
!= CIFS_SPNEGO_UPCALL_VERSION
) {
1110 "bad cifs.upcall version. Expected %d got %d",
1111 CIFS_SPNEGO_UPCALL_VERSION
, msg
->version
);
1113 goto out_put_spnego_key
;
1116 ses
->auth_key
.response
= kmemdup(msg
->data
, msg
->sesskey_len
,
1118 if (!ses
->auth_key
.response
) {
1120 "Kerberos can't allocate (%u bytes) memory",
1123 goto out_put_spnego_key
;
1125 ses
->auth_key
.len
= msg
->sesskey_len
;
1127 sess_data
->iov
[1].iov_base
= msg
->data
+ msg
->sesskey_len
;
1128 sess_data
->iov
[1].iov_len
= msg
->secblob_len
;
1130 rc
= SMB2_sess_sendreceive(sess_data
);
1132 goto out_put_spnego_key
;
1134 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1135 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1137 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1139 rc
= SMB2_sess_establish_session(sess_data
);
1141 key_invalidate(spnego_key
);
1142 key_put(spnego_key
);
1144 sess_data
->result
= rc
;
1145 sess_data
->func
= NULL
;
1146 SMB2_sess_free_buffer(sess_data
);
1150 SMB2_auth_kerberos(struct SMB2_sess_data
*sess_data
)
1152 cifs_dbg(VFS
, "Kerberos negotiated but upcall support disabled!\n");
1153 sess_data
->result
= -EOPNOTSUPP
;
1154 sess_data
->func
= NULL
;
1159 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
);
1162 SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data
*sess_data
)
1165 struct cifs_ses
*ses
= sess_data
->ses
;
1166 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1167 char *ntlmssp_blob
= NULL
;
1168 bool use_spnego
= false; /* else use raw ntlmssp */
1169 u16 blob_length
= 0;
1172 * If memory allocation is successful, caller of this function
1175 ses
->ntlmssp
= kmalloc(sizeof(struct ntlmssp_auth
), GFP_KERNEL
);
1176 if (!ses
->ntlmssp
) {
1180 ses
->ntlmssp
->sesskey_per_smbsess
= true;
1182 rc
= SMB2_sess_alloc_buffer(sess_data
);
1186 ntlmssp_blob
= kmalloc(sizeof(struct _NEGOTIATE_MESSAGE
),
1188 if (ntlmssp_blob
== NULL
) {
1193 build_ntlmssp_negotiate_blob(ntlmssp_blob
, ses
);
1195 /* BB eventually need to add this */
1196 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1200 blob_length
= sizeof(struct _NEGOTIATE_MESSAGE
);
1201 /* with raw NTLMSSP we don't encapsulate in SPNEGO */
1203 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1204 sess_data
->iov
[1].iov_len
= blob_length
;
1206 rc
= SMB2_sess_sendreceive(sess_data
);
1207 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1209 /* If true, rc here is expected and not an error */
1210 if (sess_data
->buf0_type
!= CIFS_NO_BUFFER
&&
1211 rsp
->sync_hdr
.Status
== STATUS_MORE_PROCESSING_REQUIRED
)
1217 if (offsetof(struct smb2_sess_setup_rsp
, Buffer
) !=
1218 le16_to_cpu(rsp
->SecurityBufferOffset
)) {
1219 cifs_dbg(VFS
, "Invalid security buffer offset %d\n",
1220 le16_to_cpu(rsp
->SecurityBufferOffset
));
1224 rc
= decode_ntlmssp_challenge(rsp
->Buffer
,
1225 le16_to_cpu(rsp
->SecurityBufferLength
), ses
);
1229 cifs_dbg(FYI
, "rawntlmssp session setup challenge phase\n");
1232 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1233 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1236 kfree(ntlmssp_blob
);
1237 SMB2_sess_free_buffer(sess_data
);
1239 sess_data
->result
= 0;
1240 sess_data
->func
= SMB2_sess_auth_rawntlmssp_authenticate
;
1244 kfree(ses
->ntlmssp
);
1245 ses
->ntlmssp
= NULL
;
1246 sess_data
->result
= rc
;
1247 sess_data
->func
= NULL
;
1251 SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data
*sess_data
)
1254 struct cifs_ses
*ses
= sess_data
->ses
;
1255 struct smb2_sess_setup_req
*req
;
1256 struct smb2_sess_setup_rsp
*rsp
= NULL
;
1257 unsigned char *ntlmssp_blob
= NULL
;
1258 bool use_spnego
= false; /* else use raw ntlmssp */
1259 u16 blob_length
= 0;
1261 rc
= SMB2_sess_alloc_buffer(sess_data
);
1265 req
= (struct smb2_sess_setup_req
*) sess_data
->iov
[0].iov_base
;
1266 req
->sync_hdr
.SessionId
= ses
->Suid
;
1268 rc
= build_ntlmssp_auth_blob(&ntlmssp_blob
, &blob_length
, ses
,
1271 cifs_dbg(FYI
, "build_ntlmssp_auth_blob failed %d\n", rc
);
1276 /* BB eventually need to add this */
1277 cifs_dbg(VFS
, "spnego not supported for SMB2 yet\n");
1281 sess_data
->iov
[1].iov_base
= ntlmssp_blob
;
1282 sess_data
->iov
[1].iov_len
= blob_length
;
1284 rc
= SMB2_sess_sendreceive(sess_data
);
1288 rsp
= (struct smb2_sess_setup_rsp
*)sess_data
->iov
[0].iov_base
;
1290 ses
->Suid
= rsp
->sync_hdr
.SessionId
;
1291 ses
->session_flags
= le16_to_cpu(rsp
->SessionFlags
);
1293 rc
= SMB2_sess_establish_session(sess_data
);
1295 kfree(ntlmssp_blob
);
1296 SMB2_sess_free_buffer(sess_data
);
1297 kfree(ses
->ntlmssp
);
1298 ses
->ntlmssp
= NULL
;
1299 sess_data
->result
= rc
;
1300 sess_data
->func
= NULL
;
1304 SMB2_select_sec(struct cifs_ses
*ses
, struct SMB2_sess_data
*sess_data
)
1308 type
= smb2_select_sectype(ses
->server
, ses
->sectype
);
1309 cifs_dbg(FYI
, "sess setup type %d\n", type
);
1310 if (type
== Unspecified
) {
1312 "Unable to select appropriate authentication method!");
1318 sess_data
->func
= SMB2_auth_kerberos
;
1321 sess_data
->func
= SMB2_sess_auth_rawntlmssp_negotiate
;
1324 cifs_dbg(VFS
, "secType %d not supported!\n", type
);
1332 SMB2_sess_setup(const unsigned int xid
, struct cifs_ses
*ses
,
1333 const struct nls_table
*nls_cp
)
1336 struct TCP_Server_Info
*server
= ses
->server
;
1337 struct SMB2_sess_data
*sess_data
;
1339 cifs_dbg(FYI
, "Session Setup\n");
1342 WARN(1, "%s: server is NULL!\n", __func__
);
1346 sess_data
= kzalloc(sizeof(struct SMB2_sess_data
), GFP_KERNEL
);
1350 rc
= SMB2_select_sec(ses
, sess_data
);
1353 sess_data
->xid
= xid
;
1354 sess_data
->ses
= ses
;
1355 sess_data
->buf0_type
= CIFS_NO_BUFFER
;
1356 sess_data
->nls_cp
= (struct nls_table
*) nls_cp
;
1357 sess_data
->previous_session
= ses
->Suid
;
1360 * Initialize the session hash with the server one.
1362 memcpy(ses
->preauth_sha_hash
, ses
->server
->preauth_sha_hash
,
1363 SMB2_PREAUTH_HASH_SIZE
);
1365 while (sess_data
->func
)
1366 sess_data
->func(sess_data
);
1368 if ((ses
->session_flags
& SMB2_SESSION_FLAG_IS_GUEST
) && (ses
->sign
))
1369 cifs_dbg(VFS
, "signing requested but authenticated as guest\n");
1370 rc
= sess_data
->result
;
1377 SMB2_logoff(const unsigned int xid
, struct cifs_ses
*ses
)
1379 struct smb_rqst rqst
;
1380 struct smb2_logoff_req
*req
; /* response is also trivial struct */
1382 struct TCP_Server_Info
*server
;
1384 unsigned int total_len
;
1386 struct kvec rsp_iov
;
1389 cifs_dbg(FYI
, "disconnect session %p\n", ses
);
1391 if (ses
&& (ses
->server
))
1392 server
= ses
->server
;
1396 /* no need to send SMB logoff if uid already closed due to reconnect */
1397 if (ses
->need_reconnect
)
1398 goto smb2_session_already_dead
;
1400 rc
= smb2_plain_req_init(SMB2_LOGOFF
, NULL
, (void **) &req
, &total_len
);
1404 /* since no tcon, smb2_init can not do this, so do here */
1405 req
->sync_hdr
.SessionId
= ses
->Suid
;
1407 if (ses
->session_flags
& SMB2_SESSION_FLAG_ENCRYPT_DATA
)
1408 flags
|= CIFS_TRANSFORM_REQ
;
1409 else if (server
->sign
)
1410 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1412 flags
|= CIFS_NO_RESP
;
1414 iov
[0].iov_base
= (char *)req
;
1415 iov
[0].iov_len
= total_len
;
1417 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1421 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1422 cifs_small_buf_release(req
);
1424 * No tcon so can't do
1425 * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
1428 smb2_session_already_dead
:
1432 static inline void cifs_stats_fail_inc(struct cifs_tcon
*tcon
, uint16_t code
)
1434 cifs_stats_inc(&tcon
->stats
.smb2_stats
.smb2_com_failed
[code
]);
1437 #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */)
1439 /* These are similar values to what Windows uses */
1440 static inline void init_copy_chunk_defaults(struct cifs_tcon
*tcon
)
1442 tcon
->max_chunks
= 256;
1443 tcon
->max_bytes_chunk
= 1048576;
1444 tcon
->max_bytes_copy
= 16777216;
1448 SMB2_tcon(const unsigned int xid
, struct cifs_ses
*ses
, const char *tree
,
1449 struct cifs_tcon
*tcon
, const struct nls_table
*cp
)
1451 struct smb_rqst rqst
;
1452 struct smb2_tree_connect_req
*req
;
1453 struct smb2_tree_connect_rsp
*rsp
= NULL
;
1455 struct kvec rsp_iov
= { NULL
, 0 };
1459 __le16
*unc_path
= NULL
;
1461 unsigned int total_len
;
1463 cifs_dbg(FYI
, "TCON\n");
1465 if (!(ses
->server
) || !tree
)
1468 unc_path
= kmalloc(MAX_SHARENAME_LENGTH
* 2, GFP_KERNEL
);
1469 if (unc_path
== NULL
)
1472 unc_path_len
= cifs_strtoUTF16(unc_path
, tree
, strlen(tree
), cp
) + 1;
1474 if (unc_path_len
< 2) {
1479 /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
1482 rc
= smb2_plain_req_init(SMB2_TREE_CONNECT
, tcon
, (void **) &req
,
1489 if (smb3_encryption_required(tcon
))
1490 flags
|= CIFS_TRANSFORM_REQ
;
1492 iov
[0].iov_base
= (char *)req
;
1494 iov
[0].iov_len
= total_len
- 1;
1496 /* Testing shows that buffer offset must be at location of Buffer[0] */
1497 req
->PathOffset
= cpu_to_le16(sizeof(struct smb2_tree_connect_req
)
1499 req
->PathLength
= cpu_to_le16(unc_path_len
- 2);
1500 iov
[1].iov_base
= unc_path
;
1501 iov
[1].iov_len
= unc_path_len
;
1503 /* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
1504 if ((ses
->server
->dialect
== SMB311_PROT_ID
) &&
1505 !smb3_encryption_required(tcon
))
1506 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
1508 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1512 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
1513 cifs_small_buf_release(req
);
1514 rsp
= (struct smb2_tree_connect_rsp
*)rsp_iov
.iov_base
;
1518 cifs_stats_fail_inc(tcon
, SMB2_TREE_CONNECT_HE
);
1519 tcon
->need_reconnect
= true;
1521 goto tcon_error_exit
;
1524 switch (rsp
->ShareType
) {
1525 case SMB2_SHARE_TYPE_DISK
:
1526 cifs_dbg(FYI
, "connection to disk share\n");
1528 case SMB2_SHARE_TYPE_PIPE
:
1530 cifs_dbg(FYI
, "connection to pipe share\n");
1532 case SMB2_SHARE_TYPE_PRINT
:
1534 cifs_dbg(FYI
, "connection to printer\n");
1537 cifs_dbg(VFS
, "unknown share type %d\n", rsp
->ShareType
);
1539 goto tcon_error_exit
;
1542 tcon
->share_flags
= le32_to_cpu(rsp
->ShareFlags
);
1543 tcon
->capabilities
= rsp
->Capabilities
; /* we keep caps little endian */
1544 tcon
->maximal_access
= le32_to_cpu(rsp
->MaximalAccess
);
1545 tcon
->tidStatus
= CifsGood
;
1546 tcon
->need_reconnect
= false;
1547 tcon
->tid
= rsp
->sync_hdr
.TreeId
;
1548 strlcpy(tcon
->treeName
, tree
, sizeof(tcon
->treeName
));
1550 if ((rsp
->Capabilities
& SMB2_SHARE_CAP_DFS
) &&
1551 ((tcon
->share_flags
& SHI1005_FLAGS_DFS
) == 0))
1552 cifs_dbg(VFS
, "DFS capability contradicts DFS flag\n");
1555 !(tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_ENCRYPTION
))
1556 cifs_dbg(VFS
, "Encryption is requested but not supported\n");
1558 init_copy_chunk_defaults(tcon
);
1559 if (tcon
->ses
->server
->ops
->validate_negotiate
)
1560 rc
= tcon
->ses
->server
->ops
->validate_negotiate(xid
, tcon
);
1562 free_rsp_buf(resp_buftype
, rsp
);
1567 if (rsp
&& rsp
->sync_hdr
.Status
== STATUS_BAD_NETWORK_NAME
) {
1568 cifs_dbg(VFS
, "BAD_NETWORK_NAME: %s\n", tree
);
1574 SMB2_tdis(const unsigned int xid
, struct cifs_tcon
*tcon
)
1576 struct smb_rqst rqst
;
1577 struct smb2_tree_disconnect_req
*req
; /* response is trivial */
1579 struct cifs_ses
*ses
= tcon
->ses
;
1581 unsigned int total_len
;
1583 struct kvec rsp_iov
;
1586 cifs_dbg(FYI
, "Tree Disconnect\n");
1588 if (!ses
|| !(ses
->server
))
1591 if ((tcon
->need_reconnect
) || (tcon
->ses
->need_reconnect
))
1594 rc
= smb2_plain_req_init(SMB2_TREE_DISCONNECT
, tcon
, (void **) &req
,
1599 if (smb3_encryption_required(tcon
))
1600 flags
|= CIFS_TRANSFORM_REQ
;
1602 flags
|= CIFS_NO_RESP
;
1604 iov
[0].iov_base
= (char *)req
;
1605 iov
[0].iov_len
= total_len
;
1607 memset(&rqst
, 0, sizeof(struct smb_rqst
));
1611 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
1612 cifs_small_buf_release(req
);
1614 cifs_stats_fail_inc(tcon
, SMB2_TREE_DISCONNECT_HE
);
1620 static struct create_durable
*
1621 create_durable_buf(void)
1623 struct create_durable
*buf
;
1625 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1629 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1630 (struct create_durable
, Data
));
1631 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1632 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1633 (struct create_durable
, Name
));
1634 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1635 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
1643 static struct create_durable
*
1644 create_reconnect_durable_buf(struct cifs_fid
*fid
)
1646 struct create_durable
*buf
;
1648 buf
= kzalloc(sizeof(struct create_durable
), GFP_KERNEL
);
1652 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1653 (struct create_durable
, Data
));
1654 buf
->ccontext
.DataLength
= cpu_to_le32(16);
1655 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1656 (struct create_durable
, Name
));
1657 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1658 buf
->Data
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1659 buf
->Data
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1660 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
1669 parse_lease_state(struct TCP_Server_Info
*server
, struct smb2_create_rsp
*rsp
,
1670 unsigned int *epoch
, char *lease_key
)
1673 struct create_context
*cc
;
1675 unsigned int remaining
;
1678 data_offset
= (char *)rsp
+ le32_to_cpu(rsp
->CreateContextsOffset
);
1679 remaining
= le32_to_cpu(rsp
->CreateContextsLength
);
1680 cc
= (struct create_context
*)data_offset
;
1681 while (remaining
>= sizeof(struct create_context
)) {
1682 name
= le16_to_cpu(cc
->NameOffset
) + (char *)cc
;
1683 if (le16_to_cpu(cc
->NameLength
) == 4 &&
1684 strncmp(name
, "RqLs", 4) == 0)
1685 return server
->ops
->parse_lease_buf(cc
, epoch
,
1688 next
= le32_to_cpu(cc
->Next
);
1692 cc
= (struct create_context
*)((char *)cc
+ next
);
1699 add_lease_context(struct TCP_Server_Info
*server
, struct kvec
*iov
,
1700 unsigned int *num_iovec
, u8
*lease_key
, __u8
*oplock
)
1702 struct smb2_create_req
*req
= iov
[0].iov_base
;
1703 unsigned int num
= *num_iovec
;
1705 iov
[num
].iov_base
= server
->ops
->create_lease_buf(lease_key
, *oplock
);
1706 if (iov
[num
].iov_base
== NULL
)
1708 iov
[num
].iov_len
= server
->vals
->create_lease_size
;
1709 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_LEASE
;
1710 if (!req
->CreateContextsOffset
)
1711 req
->CreateContextsOffset
= cpu_to_le32(
1712 sizeof(struct smb2_create_req
) +
1713 iov
[num
- 1].iov_len
);
1714 le32_add_cpu(&req
->CreateContextsLength
,
1715 server
->vals
->create_lease_size
);
1716 *num_iovec
= num
+ 1;
1720 static struct create_durable_v2
*
1721 create_durable_v2_buf(struct cifs_fid
*pfid
)
1723 struct create_durable_v2
*buf
;
1725 buf
= kzalloc(sizeof(struct create_durable_v2
), GFP_KERNEL
);
1729 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
1730 (struct create_durable_v2
, dcontext
));
1731 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct durable_context_v2
));
1732 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
1733 (struct create_durable_v2
, Name
));
1734 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1736 buf
->dcontext
.Timeout
= 0; /* Should this be configurable by workload */
1737 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1738 generate_random_uuid(buf
->dcontext
.CreateGuid
);
1739 memcpy(pfid
->create_guid
, buf
->dcontext
.CreateGuid
, 16);
1741 /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
1749 static struct create_durable_handle_reconnect_v2
*
1750 create_reconnect_durable_v2_buf(struct cifs_fid
*fid
)
1752 struct create_durable_handle_reconnect_v2
*buf
;
1754 buf
= kzalloc(sizeof(struct create_durable_handle_reconnect_v2
),
1759 buf
->ccontext
.DataOffset
=
1760 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1762 buf
->ccontext
.DataLength
=
1763 cpu_to_le32(sizeof(struct durable_reconnect_context_v2
));
1764 buf
->ccontext
.NameOffset
=
1765 cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2
,
1767 buf
->ccontext
.NameLength
= cpu_to_le16(4);
1769 buf
->dcontext
.Fid
.PersistentFileId
= fid
->persistent_fid
;
1770 buf
->dcontext
.Fid
.VolatileFileId
= fid
->volatile_fid
;
1771 buf
->dcontext
.Flags
= cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT
);
1772 memcpy(buf
->dcontext
.CreateGuid
, fid
->create_guid
, 16);
1774 /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
1783 add_durable_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1784 struct cifs_open_parms
*oparms
)
1786 struct smb2_create_req
*req
= iov
[0].iov_base
;
1787 unsigned int num
= *num_iovec
;
1789 iov
[num
].iov_base
= create_durable_v2_buf(oparms
->fid
);
1790 if (iov
[num
].iov_base
== NULL
)
1792 iov
[num
].iov_len
= sizeof(struct create_durable_v2
);
1793 if (!req
->CreateContextsOffset
)
1794 req
->CreateContextsOffset
=
1795 cpu_to_le32(sizeof(struct smb2_create_req
) +
1797 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable_v2
));
1798 *num_iovec
= num
+ 1;
1803 add_durable_reconnect_v2_context(struct kvec
*iov
, unsigned int *num_iovec
,
1804 struct cifs_open_parms
*oparms
)
1806 struct smb2_create_req
*req
= iov
[0].iov_base
;
1807 unsigned int num
= *num_iovec
;
1809 /* indicate that we don't need to relock the file */
1810 oparms
->reconnect
= false;
1812 iov
[num
].iov_base
= create_reconnect_durable_v2_buf(oparms
->fid
);
1813 if (iov
[num
].iov_base
== NULL
)
1815 iov
[num
].iov_len
= sizeof(struct create_durable_handle_reconnect_v2
);
1816 if (!req
->CreateContextsOffset
)
1817 req
->CreateContextsOffset
=
1818 cpu_to_le32(sizeof(struct smb2_create_req
) +
1820 le32_add_cpu(&req
->CreateContextsLength
,
1821 sizeof(struct create_durable_handle_reconnect_v2
));
1822 *num_iovec
= num
+ 1;
1827 add_durable_context(struct kvec
*iov
, unsigned int *num_iovec
,
1828 struct cifs_open_parms
*oparms
, bool use_persistent
)
1830 struct smb2_create_req
*req
= iov
[0].iov_base
;
1831 unsigned int num
= *num_iovec
;
1833 if (use_persistent
) {
1834 if (oparms
->reconnect
)
1835 return add_durable_reconnect_v2_context(iov
, num_iovec
,
1838 return add_durable_v2_context(iov
, num_iovec
, oparms
);
1841 if (oparms
->reconnect
) {
1842 iov
[num
].iov_base
= create_reconnect_durable_buf(oparms
->fid
);
1843 /* indicate that we don't need to relock the file */
1844 oparms
->reconnect
= false;
1846 iov
[num
].iov_base
= create_durable_buf();
1847 if (iov
[num
].iov_base
== NULL
)
1849 iov
[num
].iov_len
= sizeof(struct create_durable
);
1850 if (!req
->CreateContextsOffset
)
1851 req
->CreateContextsOffset
=
1852 cpu_to_le32(sizeof(struct smb2_create_req
) +
1854 le32_add_cpu(&req
->CreateContextsLength
, sizeof(struct create_durable
));
1855 *num_iovec
= num
+ 1;
1860 alloc_path_with_tree_prefix(__le16
**out_path
, int *out_size
, int *out_len
,
1861 const char *treename
, const __le16
*path
)
1863 int treename_len
, path_len
;
1864 struct nls_table
*cp
;
1865 const __le16 sep
[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
1870 treename_len
= strlen(treename
);
1871 if (treename_len
< 2 || !(treename
[0] == '\\' && treename
[1] == '\\'))
1877 path_len
= UniStrnlen((wchar_t *)path
, PATH_MAX
);
1880 * make room for one path separator between the treename and
1883 *out_len
= treename_len
+ 1 + path_len
;
1886 * final path needs to be null-terminated UTF16 with a
1890 *out_size
= roundup((*out_len
+1)*2, 8);
1891 *out_path
= kzalloc(*out_size
, GFP_KERNEL
);
1895 cp
= load_nls_default();
1896 cifs_strtoUTF16(*out_path
, treename
, treename_len
, cp
);
1897 UniStrcat(*out_path
, sep
);
1898 UniStrcat(*out_path
, path
);
1904 int smb311_posix_mkdir(const unsigned int xid
, struct inode
*inode
,
1905 umode_t mode
, struct cifs_tcon
*tcon
,
1906 const char *full_path
,
1907 struct cifs_sb_info
*cifs_sb
)
1909 struct smb_rqst rqst
;
1910 struct smb2_create_req
*req
;
1911 struct smb2_create_rsp
*rsp
= NULL
;
1912 struct TCP_Server_Info
*server
;
1913 struct cifs_ses
*ses
= tcon
->ses
;
1914 struct kvec iov
[3]; /* make sure at least one for each open context */
1915 struct kvec rsp_iov
= {NULL
, 0};
1918 __le16
*copy_path
= NULL
;
1921 unsigned int n_iov
= 2;
1922 __u32 file_attributes
= 0;
1923 char *pc_buf
= NULL
;
1925 unsigned int total_len
;
1926 __le16
*utf16_path
= NULL
;
1928 cifs_dbg(FYI
, "mkdir\n");
1930 /* resource #1: path allocation */
1931 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
1935 if (ses
&& (ses
->server
))
1936 server
= ses
->server
;
1942 /* resource #2: request */
1943 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
1948 if (smb3_encryption_required(tcon
))
1949 flags
|= CIFS_TRANSFORM_REQ
;
1951 req
->ImpersonationLevel
= IL_IMPERSONATION
;
1952 req
->DesiredAccess
= cpu_to_le32(FILE_WRITE_ATTRIBUTES
);
1953 /* File attributes ignored on open (used in create though) */
1954 req
->FileAttributes
= cpu_to_le32(file_attributes
);
1955 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
1956 req
->CreateDisposition
= cpu_to_le32(FILE_CREATE
);
1957 req
->CreateOptions
= cpu_to_le32(CREATE_NOT_FILE
);
1959 iov
[0].iov_base
= (char *)req
;
1960 /* -1 since last byte is buf[0] which is sent below (path) */
1961 iov
[0].iov_len
= total_len
- 1;
1963 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
1965 /* [MS-SMB2] 2.2.13 NameOffset:
1966 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
1967 * the SMB2 header, the file name includes a prefix that will
1968 * be processed during DFS name normalization as specified in
1969 * section 3.3.5.9. Otherwise, the file name is relative to
1970 * the share that is identified by the TreeId in the SMB2
1973 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
1976 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
1977 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
1979 tcon
->treeName
, utf16_path
);
1983 req
->NameLength
= cpu_to_le16(name_len
* 2);
1984 uni_path_len
= copy_size
;
1985 /* free before overwriting resource */
1987 utf16_path
= copy_path
;
1989 uni_path_len
= (2 * UniStrnlen((wchar_t *)utf16_path
, PATH_MAX
)) + 2;
1990 /* MUST set path len (NameLength) to 0 opening root of share */
1991 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
1992 if (uni_path_len
% 8 != 0) {
1993 copy_size
= roundup(uni_path_len
, 8);
1994 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
1999 memcpy((char *)copy_path
, (const char *)utf16_path
,
2001 uni_path_len
= copy_size
;
2002 /* free before overwriting resource */
2004 utf16_path
= copy_path
;
2008 iov
[1].iov_len
= uni_path_len
;
2009 iov
[1].iov_base
= utf16_path
;
2010 req
->RequestedOplockLevel
= SMB2_OPLOCK_LEVEL_NONE
;
2012 if (tcon
->posix_extensions
) {
2013 /* resource #3: posix buf */
2014 rc
= add_posix_context(iov
, &n_iov
, mode
);
2017 pc_buf
= iov
[n_iov
-1].iov_base
;
2021 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2023 rqst
.rq_nvec
= n_iov
;
2025 /* resource #4: response buffer */
2026 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2028 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2029 trace_smb3_posix_mkdir_err(xid
, tcon
->tid
, ses
->Suid
,
2031 FILE_WRITE_ATTRIBUTES
, rc
);
2032 goto err_free_rsp_buf
;
2035 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2036 trace_smb3_posix_mkdir_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2037 ses
->Suid
, CREATE_NOT_FILE
,
2038 FILE_WRITE_ATTRIBUTES
);
2040 SMB2_close(xid
, tcon
, rsp
->PersistentFileId
, rsp
->VolatileFileId
);
2042 /* Eventually save off posix specific response info and timestaps */
2045 free_rsp_buf(resp_buftype
, rsp
);
2048 cifs_small_buf_release(req
);
2055 SMB2_open_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
, __u8
*oplock
,
2056 struct cifs_open_parms
*oparms
, __le16
*path
)
2058 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
2059 struct smb2_create_req
*req
;
2060 unsigned int n_iov
= 2;
2061 __u32 file_attributes
= 0;
2064 unsigned int total_len
;
2065 struct kvec
*iov
= rqst
->rq_iov
;
2069 rc
= smb2_plain_req_init(SMB2_CREATE
, tcon
, (void **) &req
, &total_len
);
2073 iov
[0].iov_base
= (char *)req
;
2074 /* -1 since last byte is buf[0] which is sent below (path) */
2075 iov
[0].iov_len
= total_len
- 1;
2077 if (oparms
->create_options
& CREATE_OPTION_READONLY
)
2078 file_attributes
|= ATTR_READONLY
;
2079 if (oparms
->create_options
& CREATE_OPTION_SPECIAL
)
2080 file_attributes
|= ATTR_SYSTEM
;
2082 req
->ImpersonationLevel
= IL_IMPERSONATION
;
2083 req
->DesiredAccess
= cpu_to_le32(oparms
->desired_access
);
2084 /* File attributes ignored on open (used in create though) */
2085 req
->FileAttributes
= cpu_to_le32(file_attributes
);
2086 req
->ShareAccess
= FILE_SHARE_ALL_LE
;
2087 req
->CreateDisposition
= cpu_to_le32(oparms
->disposition
);
2088 req
->CreateOptions
= cpu_to_le32(oparms
->create_options
& CREATE_OPTIONS_MASK
);
2089 req
->NameOffset
= cpu_to_le16(sizeof(struct smb2_create_req
));
2091 /* [MS-SMB2] 2.2.13 NameOffset:
2092 * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
2093 * the SMB2 header, the file name includes a prefix that will
2094 * be processed during DFS name normalization as specified in
2095 * section 3.3.5.9. Otherwise, the file name is relative to
2096 * the share that is identified by the TreeId in the SMB2
2099 if (tcon
->share_flags
& SHI1005_FLAGS_DFS
) {
2102 req
->sync_hdr
.Flags
|= SMB2_FLAGS_DFS_OPERATIONS
;
2103 rc
= alloc_path_with_tree_prefix(©_path
, ©_size
,
2105 tcon
->treeName
, path
);
2108 req
->NameLength
= cpu_to_le16(name_len
* 2);
2109 uni_path_len
= copy_size
;
2112 uni_path_len
= (2 * UniStrnlen((wchar_t *)path
, PATH_MAX
)) + 2;
2113 /* MUST set path len (NameLength) to 0 opening root of share */
2114 req
->NameLength
= cpu_to_le16(uni_path_len
- 2);
2115 copy_size
= uni_path_len
;
2116 if (copy_size
% 8 != 0)
2117 copy_size
= roundup(copy_size
, 8);
2118 copy_path
= kzalloc(copy_size
, GFP_KERNEL
);
2121 memcpy((char *)copy_path
, (const char *)path
,
2123 uni_path_len
= copy_size
;
2127 iov
[1].iov_len
= uni_path_len
;
2128 iov
[1].iov_base
= path
;
2130 if (!server
->oplocks
)
2131 *oplock
= SMB2_OPLOCK_LEVEL_NONE
;
2133 if (!(server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) ||
2134 *oplock
== SMB2_OPLOCK_LEVEL_NONE
)
2135 req
->RequestedOplockLevel
= *oplock
;
2137 rc
= add_lease_context(server
, iov
, &n_iov
,
2138 oparms
->fid
->lease_key
, oplock
);
2143 if (*oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
2144 /* need to set Next field of lease context if we request it */
2145 if (server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
) {
2146 struct create_context
*ccontext
=
2147 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2149 cpu_to_le32(server
->vals
->create_lease_size
);
2152 rc
= add_durable_context(iov
, &n_iov
, oparms
,
2153 tcon
->use_persistent
);
2158 if (tcon
->posix_extensions
) {
2160 struct create_context
*ccontext
=
2161 (struct create_context
*)iov
[n_iov
-1].iov_base
;
2163 cpu_to_le32(iov
[n_iov
-1].iov_len
);
2166 rc
= add_posix_context(iov
, &n_iov
, oparms
->mode
);
2171 rqst
->rq_nvec
= n_iov
;
2175 /* rq_iov[0] is the request and is released by cifs_small_buf_release().
2176 * All other vectors are freed by kfree().
2179 SMB2_open_free(struct smb_rqst
*rqst
)
2183 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
);
2184 for (i
= 1; i
< rqst
->rq_nvec
; i
++)
2185 kfree(rqst
->rq_iov
[i
].iov_base
);
2189 SMB2_open(const unsigned int xid
, struct cifs_open_parms
*oparms
, __le16
*path
,
2190 __u8
*oplock
, struct smb2_file_all_info
*buf
,
2191 struct kvec
*err_iov
, int *buftype
)
2193 struct smb_rqst rqst
;
2194 struct smb2_create_rsp
*rsp
= NULL
;
2195 struct TCP_Server_Info
*server
;
2196 struct cifs_tcon
*tcon
= oparms
->tcon
;
2197 struct cifs_ses
*ses
= tcon
->ses
;
2198 struct kvec iov
[5]; /* make sure at least one for each open context */
2199 struct kvec rsp_iov
= {NULL
, 0};
2204 cifs_dbg(FYI
, "create/open\n");
2205 if (ses
&& (ses
->server
))
2206 server
= ses
->server
;
2210 if (smb3_encryption_required(tcon
))
2211 flags
|= CIFS_TRANSFORM_REQ
;
2213 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2214 memset(&iov
, 0, sizeof(iov
));
2218 rc
= SMB2_open_init(tcon
, &rqst
, oplock
, oparms
, path
);
2222 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2224 rsp
= (struct smb2_create_rsp
*)rsp_iov
.iov_base
;
2227 cifs_stats_fail_inc(tcon
, SMB2_CREATE_HE
);
2228 if (err_iov
&& rsp
) {
2230 *buftype
= resp_buftype
;
2231 resp_buftype
= CIFS_NO_BUFFER
;
2234 trace_smb3_open_err(xid
, tcon
->tid
, ses
->Suid
,
2235 oparms
->create_options
, oparms
->desired_access
, rc
);
2238 trace_smb3_open_done(xid
, rsp
->PersistentFileId
, tcon
->tid
,
2239 ses
->Suid
, oparms
->create_options
,
2240 oparms
->desired_access
);
2242 oparms
->fid
->persistent_fid
= rsp
->PersistentFileId
;
2243 oparms
->fid
->volatile_fid
= rsp
->VolatileFileId
;
2246 memcpy(buf
, &rsp
->CreationTime
, 32);
2247 buf
->AllocationSize
= rsp
->AllocationSize
;
2248 buf
->EndOfFile
= rsp
->EndofFile
;
2249 buf
->Attributes
= rsp
->FileAttributes
;
2250 buf
->NumberOfLinks
= cpu_to_le32(1);
2251 buf
->DeletePending
= 0;
2254 if (rsp
->OplockLevel
== SMB2_OPLOCK_LEVEL_LEASE
)
2255 *oplock
= parse_lease_state(server
, rsp
, &oparms
->fid
->epoch
,
2256 oparms
->fid
->lease_key
);
2258 *oplock
= rsp
->OplockLevel
;
2260 SMB2_open_free(&rqst
);
2261 free_rsp_buf(resp_buftype
, rsp
);
2266 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
2269 SMB2_ioctl(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2270 u64 volatile_fid
, u32 opcode
, bool is_fsctl
,
2271 char *in_data
, u32 indatalen
,
2272 char **out_data
, u32
*plen
/* returned data len */)
2274 struct smb_rqst rqst
;
2275 struct smb2_ioctl_req
*req
;
2276 struct smb2_ioctl_rsp
*rsp
;
2277 struct cifs_ses
*ses
;
2279 struct kvec rsp_iov
;
2284 unsigned int total_len
;
2286 cifs_dbg(FYI
, "SMB2 IOCTL\n");
2288 if (out_data
!= NULL
)
2291 /* zero out returned data len, in case of error */
2300 if (!ses
|| !(ses
->server
))
2303 rc
= smb2_plain_req_init(SMB2_IOCTL
, tcon
, (void **) &req
, &total_len
);
2307 if (smb3_encryption_required(tcon
))
2308 flags
|= CIFS_TRANSFORM_REQ
;
2310 req
->CtlCode
= cpu_to_le32(opcode
);
2311 req
->PersistentFileId
= persistent_fid
;
2312 req
->VolatileFileId
= volatile_fid
;
2315 req
->InputCount
= cpu_to_le32(indatalen
);
2316 /* do not set InputOffset if no input data */
2318 cpu_to_le32(offsetof(struct smb2_ioctl_req
, Buffer
));
2319 iov
[1].iov_base
= in_data
;
2320 iov
[1].iov_len
= indatalen
;
2325 req
->OutputOffset
= 0;
2326 req
->OutputCount
= 0; /* MBZ */
2329 * Could increase MaxOutputResponse, but that would require more
2330 * than one credit. Windows typically sets this smaller, but for some
2331 * ioctls it may be useful to allow server to send more. No point
2332 * limiting what the server can send as long as fits in one credit
2333 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
2334 * (by default, note that it can be overridden to make max larger)
2335 * in responses (except for read responses which can be bigger.
2336 * We may want to bump this limit up
2338 req
->MaxOutputResponse
= cpu_to_le32(CIFSMaxBufSize
);
2341 req
->Flags
= cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL
);
2345 iov
[0].iov_base
= (char *)req
;
2348 * If no input data, the size of ioctl struct in
2349 * protocol spec still includes a 1 byte data buffer,
2350 * but if input data passed to ioctl, we do not
2351 * want to double count this, so we do not send
2352 * the dummy one byte of data in iovec[0] if sending
2353 * input data (in iovec[1]).
2357 iov
[0].iov_len
= total_len
- 1;
2359 iov
[0].iov_len
= total_len
;
2361 /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
2362 if (opcode
== FSCTL_VALIDATE_NEGOTIATE_INFO
)
2363 req
->sync_hdr
.Flags
|= SMB2_FLAGS_SIGNED
;
2365 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2367 rqst
.rq_nvec
= n_iov
;
2369 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
2371 cifs_small_buf_release(req
);
2372 rsp
= (struct smb2_ioctl_rsp
*)rsp_iov
.iov_base
;
2375 trace_smb3_fsctl_err(xid
, persistent_fid
, tcon
->tid
,
2376 ses
->Suid
, 0, opcode
, rc
);
2378 if ((rc
!= 0) && (rc
!= -EINVAL
)) {
2379 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2381 } else if (rc
== -EINVAL
) {
2382 if ((opcode
!= FSCTL_SRV_COPYCHUNK_WRITE
) &&
2383 (opcode
!= FSCTL_SRV_COPYCHUNK
)) {
2384 cifs_stats_fail_inc(tcon
, SMB2_IOCTL_HE
);
2389 /* check if caller wants to look at return data or just return rc */
2390 if ((plen
== NULL
) || (out_data
== NULL
))
2393 *plen
= le32_to_cpu(rsp
->OutputCount
);
2395 /* We check for obvious errors in the output buffer length and offset */
2397 goto ioctl_exit
; /* server returned no data */
2398 else if (*plen
> 0xFF00) {
2399 cifs_dbg(VFS
, "srv returned invalid ioctl length: %d\n", *plen
);
2405 if (rsp_iov
.iov_len
< le32_to_cpu(rsp
->OutputOffset
) + *plen
) {
2406 cifs_dbg(VFS
, "Malformed ioctl resp: len %d offset %d\n", *plen
,
2407 le32_to_cpu(rsp
->OutputOffset
));
2413 *out_data
= kmalloc(*plen
, GFP_KERNEL
);
2414 if (*out_data
== NULL
) {
2419 memcpy(*out_data
, (char *)rsp
+ le32_to_cpu(rsp
->OutputOffset
), *plen
);
2421 free_rsp_buf(resp_buftype
, rsp
);
2426 * Individual callers to ioctl worker function follow
2430 SMB2_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
2431 u64 persistent_fid
, u64 volatile_fid
)
2434 struct compress_ioctl fsctl_input
;
2435 char *ret_data
= NULL
;
2437 fsctl_input
.CompressionState
=
2438 cpu_to_le16(COMPRESSION_FORMAT_DEFAULT
);
2440 rc
= SMB2_ioctl(xid
, tcon
, persistent_fid
, volatile_fid
,
2441 FSCTL_SET_COMPRESSION
, true /* is_fsctl */,
2442 (char *)&fsctl_input
/* data input */,
2443 2 /* in data len */, &ret_data
/* out data */, NULL
);
2445 cifs_dbg(FYI
, "set compression rc %d\n", rc
);
2451 SMB2_close_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2452 u64 persistent_fid
, u64 volatile_fid
)
2454 struct smb2_close_req
*req
;
2455 struct kvec
*iov
= rqst
->rq_iov
;
2456 unsigned int total_len
;
2459 rc
= smb2_plain_req_init(SMB2_CLOSE
, tcon
, (void **) &req
, &total_len
);
2463 req
->PersistentFileId
= persistent_fid
;
2464 req
->VolatileFileId
= volatile_fid
;
2465 iov
[0].iov_base
= (char *)req
;
2466 iov
[0].iov_len
= total_len
;
2472 SMB2_close_free(struct smb_rqst
*rqst
)
2474 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2478 SMB2_close_flags(const unsigned int xid
, struct cifs_tcon
*tcon
,
2479 u64 persistent_fid
, u64 volatile_fid
, int flags
)
2481 struct smb_rqst rqst
;
2482 struct smb2_close_rsp
*rsp
= NULL
;
2483 struct cifs_ses
*ses
= tcon
->ses
;
2485 struct kvec rsp_iov
;
2489 cifs_dbg(FYI
, "Close\n");
2491 if (!ses
|| !(ses
->server
))
2494 if (smb3_encryption_required(tcon
))
2495 flags
|= CIFS_TRANSFORM_REQ
;
2497 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2498 memset(&iov
, 0, sizeof(iov
));
2502 rc
= SMB2_close_init(tcon
, &rqst
, persistent_fid
, volatile_fid
);
2506 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2507 rsp
= (struct smb2_close_rsp
*)rsp_iov
.iov_base
;
2510 cifs_stats_fail_inc(tcon
, SMB2_CLOSE_HE
);
2511 trace_smb3_close_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
2516 /* BB FIXME - decode close response, update inode for caching */
2519 SMB2_close_free(&rqst
);
2520 free_rsp_buf(resp_buftype
, rsp
);
2525 SMB2_close(const unsigned int xid
, struct cifs_tcon
*tcon
,
2526 u64 persistent_fid
, u64 volatile_fid
)
2528 return SMB2_close_flags(xid
, tcon
, persistent_fid
, volatile_fid
, 0);
2532 validate_iov(unsigned int offset
, unsigned int buffer_length
,
2533 struct kvec
*iov
, unsigned int min_buf_size
)
2535 unsigned int smb_len
= iov
->iov_len
;
2536 char *end_of_smb
= smb_len
+ (char *)iov
->iov_base
;
2537 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2538 char *end_of_buf
= begin_of_buf
+ buffer_length
;
2541 if (buffer_length
< min_buf_size
) {
2542 cifs_dbg(VFS
, "buffer length %d smaller than minimum size %d\n",
2543 buffer_length
, min_buf_size
);
2547 /* check if beyond RFC1001 maximum length */
2548 if ((smb_len
> 0x7FFFFF) || (buffer_length
> 0x7FFFFF)) {
2549 cifs_dbg(VFS
, "buffer length %d or smb length %d too large\n",
2550 buffer_length
, smb_len
);
2554 if ((begin_of_buf
> end_of_smb
) || (end_of_buf
> end_of_smb
)) {
2555 cifs_dbg(VFS
, "illegal server response, bad offset to data\n");
2563 * If SMB buffer fields are valid, copy into temporary buffer to hold result.
2564 * Caller must free buffer.
2567 validate_and_copy_iov(unsigned int offset
, unsigned int buffer_length
,
2568 struct kvec
*iov
, unsigned int minbufsize
,
2571 char *begin_of_buf
= offset
+ (char *)iov
->iov_base
;
2577 rc
= validate_iov(offset
, buffer_length
, iov
, minbufsize
);
2581 memcpy(data
, begin_of_buf
, buffer_length
);
2587 SMB2_query_info_init(struct cifs_tcon
*tcon
, struct smb_rqst
*rqst
,
2588 u64 persistent_fid
, u64 volatile_fid
,
2589 u8 info_class
, u8 info_type
, u32 additional_info
,
2592 struct smb2_query_info_req
*req
;
2593 struct kvec
*iov
= rqst
->rq_iov
;
2594 unsigned int total_len
;
2597 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
2602 req
->InfoType
= info_type
;
2603 req
->FileInfoClass
= info_class
;
2604 req
->PersistentFileId
= persistent_fid
;
2605 req
->VolatileFileId
= volatile_fid
;
2606 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
2609 * We do not use the input buffer (do not send extra byte)
2611 req
->InputBufferOffset
= 0;
2613 req
->OutputBufferLength
= cpu_to_le32(output_len
);
2615 iov
[0].iov_base
= (char *)req
;
2617 iov
[0].iov_len
= total_len
- 1;
2622 SMB2_query_info_free(struct smb_rqst
*rqst
)
2624 cifs_small_buf_release(rqst
->rq_iov
[0].iov_base
); /* request */
2628 query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2629 u64 persistent_fid
, u64 volatile_fid
, u8 info_class
, u8 info_type
,
2630 u32 additional_info
, size_t output_len
, size_t min_len
, void **data
,
2633 struct smb_rqst rqst
;
2634 struct smb2_query_info_rsp
*rsp
= NULL
;
2636 struct kvec rsp_iov
;
2639 struct cifs_ses
*ses
= tcon
->ses
;
2642 cifs_dbg(FYI
, "Query Info\n");
2644 if (!ses
|| !(ses
->server
))
2647 if (smb3_encryption_required(tcon
))
2648 flags
|= CIFS_TRANSFORM_REQ
;
2650 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2651 memset(&iov
, 0, sizeof(iov
));
2655 rc
= SMB2_query_info_init(tcon
, &rqst
, persistent_fid
, volatile_fid
,
2656 info_class
, info_type
, additional_info
,
2661 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2662 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
2665 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
2666 trace_smb3_query_info_err(xid
, persistent_fid
, tcon
->tid
,
2667 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
2672 *dlen
= le32_to_cpu(rsp
->OutputBufferLength
);
2674 *data
= kmalloc(*dlen
, GFP_KERNEL
);
2677 "Error %d allocating memory for acl\n",
2685 rc
= validate_and_copy_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
2686 le32_to_cpu(rsp
->OutputBufferLength
),
2687 &rsp_iov
, min_len
, *data
);
2690 SMB2_query_info_free(&rqst
);
2691 free_rsp_buf(resp_buftype
, rsp
);
2695 int SMB2_query_eas(const unsigned int xid
, struct cifs_tcon
*tcon
,
2696 u64 persistent_fid
, u64 volatile_fid
,
2697 int ea_buf_size
, struct smb2_file_full_ea_info
*data
)
2699 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2700 FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2702 sizeof(struct smb2_file_full_ea_info
),
2707 int SMB2_query_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
2708 u64 persistent_fid
, u64 volatile_fid
, struct smb2_file_all_info
*data
)
2710 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2711 FILE_ALL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2712 sizeof(struct smb2_file_all_info
) + PATH_MAX
* 2,
2713 sizeof(struct smb2_file_all_info
), (void **)&data
,
2718 SMB2_query_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
2719 u64 persistent_fid
, u64 volatile_fid
,
2720 void **data
, u32
*plen
)
2722 __u32 additional_info
= OWNER_SECINFO
| GROUP_SECINFO
| DACL_SECINFO
;
2725 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2726 0, SMB2_O_INFO_SECURITY
, additional_info
,
2727 SMB2_MAX_BUFFER_SIZE
, MIN_SEC_DESC_LEN
, data
, plen
);
2731 SMB2_get_srv_num(const unsigned int xid
, struct cifs_tcon
*tcon
,
2732 u64 persistent_fid
, u64 volatile_fid
, __le64
*uniqueid
)
2734 return query_info(xid
, tcon
, persistent_fid
, volatile_fid
,
2735 FILE_INTERNAL_INFORMATION
, SMB2_O_INFO_FILE
, 0,
2736 sizeof(struct smb2_file_internal_info
),
2737 sizeof(struct smb2_file_internal_info
),
2738 (void **)&uniqueid
, NULL
);
2742 * This is a no-op for now. We're not really interested in the reply, but
2743 * rather in the fact that the server sent one and that server->lstrp
2746 * FIXME: maybe we should consider checking that the reply matches request?
2749 smb2_echo_callback(struct mid_q_entry
*mid
)
2751 struct TCP_Server_Info
*server
= mid
->callback_data
;
2752 struct smb2_echo_rsp
*rsp
= (struct smb2_echo_rsp
*)mid
->resp_buf
;
2753 unsigned int credits_received
= 1;
2755 if (mid
->mid_state
== MID_RESPONSE_RECEIVED
)
2756 credits_received
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
2758 DeleteMidQEntry(mid
);
2759 add_credits(server
, credits_received
, CIFS_ECHO_OP
);
2762 void smb2_reconnect_server(struct work_struct
*work
)
2764 struct TCP_Server_Info
*server
= container_of(work
,
2765 struct TCP_Server_Info
, reconnect
.work
);
2766 struct cifs_ses
*ses
;
2767 struct cifs_tcon
*tcon
, *tcon2
;
2768 struct list_head tmp_list
;
2769 int tcon_exist
= false;
2771 int resched
= false;
2774 /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
2775 mutex_lock(&server
->reconnect_mutex
);
2777 INIT_LIST_HEAD(&tmp_list
);
2778 cifs_dbg(FYI
, "Need negotiate, reconnecting tcons\n");
2780 spin_lock(&cifs_tcp_ses_lock
);
2781 list_for_each_entry(ses
, &server
->smb_ses_list
, smb_ses_list
) {
2782 list_for_each_entry(tcon
, &ses
->tcon_list
, tcon_list
) {
2783 if (tcon
->need_reconnect
|| tcon
->need_reopen_files
) {
2785 list_add_tail(&tcon
->rlist
, &tmp_list
);
2789 if (ses
->tcon_ipc
&& ses
->tcon_ipc
->need_reconnect
) {
2790 list_add_tail(&ses
->tcon_ipc
->rlist
, &tmp_list
);
2795 * Get the reference to server struct to be sure that the last call of
2796 * cifs_put_tcon() in the loop below won't release the server pointer.
2799 server
->srv_count
++;
2801 spin_unlock(&cifs_tcp_ses_lock
);
2803 list_for_each_entry_safe(tcon
, tcon2
, &tmp_list
, rlist
) {
2804 rc
= smb2_reconnect(SMB2_INTERNAL_CMD
, tcon
);
2806 cifs_reopen_persistent_handles(tcon
);
2809 list_del_init(&tcon
->rlist
);
2810 cifs_put_tcon(tcon
);
2813 cifs_dbg(FYI
, "Reconnecting tcons finished\n");
2815 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 2 * HZ
);
2816 mutex_unlock(&server
->reconnect_mutex
);
2818 /* now we can safely release srv struct */
2820 cifs_put_tcp_session(server
, 1);
2824 SMB2_echo(struct TCP_Server_Info
*server
)
2826 struct smb2_echo_req
*req
;
2829 struct smb_rqst rqst
= { .rq_iov
= iov
,
2831 unsigned int total_len
;
2833 cifs_dbg(FYI
, "In echo request\n");
2835 if (server
->tcpStatus
== CifsNeedNegotiate
) {
2836 /* No need to send echo on newly established connections */
2837 queue_delayed_work(cifsiod_wq
, &server
->reconnect
, 0);
2841 rc
= smb2_plain_req_init(SMB2_ECHO
, NULL
, (void **)&req
, &total_len
);
2845 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
2847 iov
[0].iov_len
= total_len
;
2848 iov
[0].iov_base
= (char *)req
;
2850 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_echo_callback
, NULL
,
2851 server
, CIFS_ECHO_OP
);
2853 cifs_dbg(FYI
, "Echo request failed: %d\n", rc
);
2855 cifs_small_buf_release(req
);
2860 SMB2_flush(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
2863 struct smb_rqst rqst
;
2864 struct smb2_flush_req
*req
;
2865 struct cifs_ses
*ses
= tcon
->ses
;
2867 struct kvec rsp_iov
;
2871 unsigned int total_len
;
2873 cifs_dbg(FYI
, "Flush\n");
2875 if (!ses
|| !(ses
->server
))
2878 rc
= smb2_plain_req_init(SMB2_FLUSH
, tcon
, (void **) &req
, &total_len
);
2882 if (smb3_encryption_required(tcon
))
2883 flags
|= CIFS_TRANSFORM_REQ
;
2885 req
->PersistentFileId
= persistent_fid
;
2886 req
->VolatileFileId
= volatile_fid
;
2888 iov
[0].iov_base
= (char *)req
;
2889 iov
[0].iov_len
= total_len
;
2891 memset(&rqst
, 0, sizeof(struct smb_rqst
));
2895 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
2896 cifs_small_buf_release(req
);
2899 cifs_stats_fail_inc(tcon
, SMB2_FLUSH_HE
);
2900 trace_smb3_flush_err(xid
, persistent_fid
, tcon
->tid
, ses
->Suid
,
2904 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
2909 * To form a chain of read requests, any read requests after the first should
2910 * have the end_of_chain boolean set to true.
2913 smb2_new_read_req(void **buf
, unsigned int *total_len
,
2914 struct cifs_io_parms
*io_parms
, struct cifs_readdata
*rdata
,
2915 unsigned int remaining_bytes
, int request_type
)
2918 struct smb2_read_plain_req
*req
= NULL
;
2919 struct smb2_sync_hdr
*shdr
;
2920 struct TCP_Server_Info
*server
;
2922 rc
= smb2_plain_req_init(SMB2_READ
, io_parms
->tcon
, (void **) &req
,
2927 server
= io_parms
->tcon
->ses
->server
;
2929 return -ECONNABORTED
;
2931 shdr
= &req
->sync_hdr
;
2932 shdr
->ProcessId
= cpu_to_le32(io_parms
->pid
);
2934 req
->PersistentFileId
= io_parms
->persistent_fid
;
2935 req
->VolatileFileId
= io_parms
->volatile_fid
;
2936 req
->ReadChannelInfoOffset
= 0; /* reserved */
2937 req
->ReadChannelInfoLength
= 0; /* reserved */
2938 req
->Channel
= 0; /* reserved */
2939 req
->MinimumCount
= 0;
2940 req
->Length
= cpu_to_le32(io_parms
->length
);
2941 req
->Offset
= cpu_to_le64(io_parms
->offset
);
2942 #ifdef CONFIG_CIFS_SMB_DIRECT
2944 * If we want to do a RDMA write, fill in and append
2945 * smbd_buffer_descriptor_v1 to the end of read request
2947 if (server
->rdma
&& rdata
&& !server
->sign
&&
2948 rdata
->bytes
>= server
->smbd_conn
->rdma_readwrite_threshold
) {
2950 struct smbd_buffer_descriptor_v1
*v1
;
2951 bool need_invalidate
=
2952 io_parms
->tcon
->ses
->server
->dialect
== SMB30_PROT_ID
;
2954 rdata
->mr
= smbd_register_mr(
2955 server
->smbd_conn
, rdata
->pages
,
2956 rdata
->nr_pages
, rdata
->page_offset
,
2957 rdata
->tailsz
, true, need_invalidate
);
2961 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
2962 if (need_invalidate
)
2963 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
2964 req
->ReadChannelInfoOffset
=
2965 cpu_to_le16(offsetof(struct smb2_read_plain_req
, Buffer
));
2966 req
->ReadChannelInfoLength
=
2967 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
2968 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
2969 v1
->offset
= cpu_to_le64(rdata
->mr
->mr
->iova
);
2970 v1
->token
= cpu_to_le32(rdata
->mr
->mr
->rkey
);
2971 v1
->length
= cpu_to_le32(rdata
->mr
->mr
->length
);
2973 *total_len
+= sizeof(*v1
) - 1;
2976 if (request_type
& CHAINED_REQUEST
) {
2977 if (!(request_type
& END_OF_CHAIN
)) {
2978 /* next 8-byte aligned request */
2979 *total_len
= DIV_ROUND_UP(*total_len
, 8) * 8;
2980 shdr
->NextCommand
= cpu_to_le32(*total_len
);
2981 } else /* END_OF_CHAIN */
2982 shdr
->NextCommand
= 0;
2983 if (request_type
& RELATED_REQUEST
) {
2984 shdr
->Flags
|= SMB2_FLAGS_RELATED_OPERATIONS
;
2986 * Related requests use info from previous read request
2989 shdr
->SessionId
= 0xFFFFFFFF;
2990 shdr
->TreeId
= 0xFFFFFFFF;
2991 req
->PersistentFileId
= 0xFFFFFFFF;
2992 req
->VolatileFileId
= 0xFFFFFFFF;
2995 if (remaining_bytes
> io_parms
->length
)
2996 req
->RemainingBytes
= cpu_to_le32(remaining_bytes
);
2998 req
->RemainingBytes
= 0;
3005 smb2_readv_callback(struct mid_q_entry
*mid
)
3007 struct cifs_readdata
*rdata
= mid
->callback_data
;
3008 struct cifs_tcon
*tcon
= tlink_tcon(rdata
->cfile
->tlink
);
3009 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3010 struct smb2_sync_hdr
*shdr
=
3011 (struct smb2_sync_hdr
*)rdata
->iov
[0].iov_base
;
3012 unsigned int credits_received
= 1;
3013 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
3015 .rq_pages
= rdata
->pages
,
3016 .rq_offset
= rdata
->page_offset
,
3017 .rq_npages
= rdata
->nr_pages
,
3018 .rq_pagesz
= rdata
->pagesz
,
3019 .rq_tailsz
= rdata
->tailsz
};
3021 cifs_dbg(FYI
, "%s: mid=%llu state=%d result=%d bytes=%u\n",
3022 __func__
, mid
->mid
, mid
->mid_state
, rdata
->result
,
3025 switch (mid
->mid_state
) {
3026 case MID_RESPONSE_RECEIVED
:
3027 credits_received
= le16_to_cpu(shdr
->CreditRequest
);
3028 /* result already set, check signature */
3029 if (server
->sign
&& !mid
->decrypted
) {
3032 rc
= smb2_verify_signature(&rqst
, server
);
3034 cifs_dbg(VFS
, "SMB signature verification returned error = %d\n",
3037 /* FIXME: should this be counted toward the initiating task? */
3038 task_io_account_read(rdata
->got_bytes
);
3039 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3041 case MID_REQUEST_SUBMITTED
:
3042 case MID_RETRY_NEEDED
:
3043 rdata
->result
= -EAGAIN
;
3044 if (server
->sign
&& rdata
->got_bytes
)
3045 /* reset bytes number since we can not check a sign */
3046 rdata
->got_bytes
= 0;
3047 /* FIXME: should this be counted toward the initiating task? */
3048 task_io_account_read(rdata
->got_bytes
);
3049 cifs_stats_bytes_read(tcon
, rdata
->got_bytes
);
3052 if (rdata
->result
!= -ENODATA
)
3053 rdata
->result
= -EIO
;
3055 #ifdef CONFIG_CIFS_SMB_DIRECT
3057 * If this rdata has a memmory registered, the MR can be freed
3058 * MR needs to be freed as soon as I/O finishes to prevent deadlock
3059 * because they have limited number and are used for future I/Os
3062 smbd_deregister_mr(rdata
->mr
);
3067 cifs_stats_fail_inc(tcon
, SMB2_READ_HE
);
3069 queue_work(cifsiod_wq
, &rdata
->work
);
3070 DeleteMidQEntry(mid
);
3071 add_credits(server
, credits_received
, 0);
3074 /* smb2_async_readv - send an async read, and set up mid to handle result */
3076 smb2_async_readv(struct cifs_readdata
*rdata
)
3080 struct smb2_sync_hdr
*shdr
;
3081 struct cifs_io_parms io_parms
;
3082 struct smb_rqst rqst
= { .rq_iov
= rdata
->iov
,
3084 struct TCP_Server_Info
*server
;
3085 unsigned int total_len
;
3087 cifs_dbg(FYI
, "%s: offset=%llu bytes=%u\n",
3088 __func__
, rdata
->offset
, rdata
->bytes
);
3090 io_parms
.tcon
= tlink_tcon(rdata
->cfile
->tlink
);
3091 io_parms
.offset
= rdata
->offset
;
3092 io_parms
.length
= rdata
->bytes
;
3093 io_parms
.persistent_fid
= rdata
->cfile
->fid
.persistent_fid
;
3094 io_parms
.volatile_fid
= rdata
->cfile
->fid
.volatile_fid
;
3095 io_parms
.pid
= rdata
->pid
;
3097 server
= io_parms
.tcon
->ses
->server
;
3099 rc
= smb2_new_read_req(
3100 (void **) &buf
, &total_len
, &io_parms
, rdata
, 0, 0);
3102 if (rc
== -EAGAIN
&& rdata
->credits
) {
3103 /* credits was reset by reconnect */
3105 /* reduce in_flight value since we won't send the req */
3106 spin_lock(&server
->req_lock
);
3107 server
->in_flight
--;
3108 spin_unlock(&server
->req_lock
);
3113 if (smb3_encryption_required(io_parms
.tcon
))
3114 flags
|= CIFS_TRANSFORM_REQ
;
3116 rdata
->iov
[0].iov_base
= buf
;
3117 rdata
->iov
[0].iov_len
= total_len
;
3119 shdr
= (struct smb2_sync_hdr
*)buf
;
3121 if (rdata
->credits
) {
3122 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(rdata
->bytes
,
3123 SMB2_MAX_BUFFER_SIZE
));
3124 shdr
->CreditRequest
= shdr
->CreditCharge
;
3125 spin_lock(&server
->req_lock
);
3126 server
->credits
+= rdata
->credits
-
3127 le16_to_cpu(shdr
->CreditCharge
);
3128 spin_unlock(&server
->req_lock
);
3129 wake_up(&server
->request_q
);
3130 flags
|= CIFS_HAS_CREDITS
;
3133 kref_get(&rdata
->refcount
);
3134 rc
= cifs_call_async(io_parms
.tcon
->ses
->server
, &rqst
,
3135 cifs_readv_receive
, smb2_readv_callback
,
3136 smb3_handle_read_data
, rdata
, flags
);
3138 kref_put(&rdata
->refcount
, cifs_readdata_release
);
3139 cifs_stats_fail_inc(io_parms
.tcon
, SMB2_READ_HE
);
3140 trace_smb3_read_err(rc
, 0 /* xid */, io_parms
.persistent_fid
,
3141 io_parms
.tcon
->tid
, io_parms
.tcon
->ses
->Suid
,
3142 io_parms
.offset
, io_parms
.length
);
3144 trace_smb3_read_done(0 /* xid */, io_parms
.persistent_fid
,
3145 io_parms
.tcon
->tid
, io_parms
.tcon
->ses
->Suid
,
3146 io_parms
.offset
, io_parms
.length
);
3148 cifs_small_buf_release(buf
);
3153 SMB2_read(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3154 unsigned int *nbytes
, char **buf
, int *buf_type
)
3156 struct smb_rqst rqst
;
3157 int resp_buftype
, rc
= -EACCES
;
3158 struct smb2_read_plain_req
*req
= NULL
;
3159 struct smb2_read_rsp
*rsp
= NULL
;
3161 struct kvec rsp_iov
;
3162 unsigned int total_len
;
3163 int flags
= CIFS_LOG_ERROR
;
3164 struct cifs_ses
*ses
= io_parms
->tcon
->ses
;
3167 rc
= smb2_new_read_req((void **)&req
, &total_len
, io_parms
, NULL
, 0, 0);
3171 if (smb3_encryption_required(io_parms
->tcon
))
3172 flags
|= CIFS_TRANSFORM_REQ
;
3174 iov
[0].iov_base
= (char *)req
;
3175 iov
[0].iov_len
= total_len
;
3177 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3181 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3182 cifs_small_buf_release(req
);
3184 rsp
= (struct smb2_read_rsp
*)rsp_iov
.iov_base
;
3187 if (rc
!= -ENODATA
) {
3188 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_READ_HE
);
3189 cifs_dbg(VFS
, "Send error in read = %d\n", rc
);
3191 trace_smb3_read_err(rc
, xid
, req
->PersistentFileId
,
3192 io_parms
->tcon
->tid
, ses
->Suid
,
3193 io_parms
->offset
, io_parms
->length
);
3194 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3195 return rc
== -ENODATA
? 0 : rc
;
3197 trace_smb3_read_done(xid
, req
->PersistentFileId
,
3198 io_parms
->tcon
->tid
, ses
->Suid
,
3199 io_parms
->offset
, io_parms
->length
);
3201 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3202 if ((*nbytes
> CIFS_MAX_MSGSIZE
) ||
3203 (*nbytes
> io_parms
->length
)) {
3204 cifs_dbg(FYI
, "bad length %d for count %d\n",
3205 *nbytes
, io_parms
->length
);
3211 memcpy(*buf
, (char *)rsp
+ rsp
->DataOffset
, *nbytes
);
3212 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
3213 } else if (resp_buftype
!= CIFS_NO_BUFFER
) {
3214 *buf
= rsp_iov
.iov_base
;
3215 if (resp_buftype
== CIFS_SMALL_BUFFER
)
3216 *buf_type
= CIFS_SMALL_BUFFER
;
3217 else if (resp_buftype
== CIFS_LARGE_BUFFER
)
3218 *buf_type
= CIFS_LARGE_BUFFER
;
3224 * Check the mid_state and signature on received buffer (if any), and queue the
3225 * workqueue completion task.
3228 smb2_writev_callback(struct mid_q_entry
*mid
)
3230 struct cifs_writedata
*wdata
= mid
->callback_data
;
3231 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3232 unsigned int written
;
3233 struct smb2_write_rsp
*rsp
= (struct smb2_write_rsp
*)mid
->resp_buf
;
3234 unsigned int credits_received
= 1;
3236 switch (mid
->mid_state
) {
3237 case MID_RESPONSE_RECEIVED
:
3238 credits_received
= le16_to_cpu(rsp
->sync_hdr
.CreditRequest
);
3239 wdata
->result
= smb2_check_receive(mid
, tcon
->ses
->server
, 0);
3240 if (wdata
->result
!= 0)
3243 written
= le32_to_cpu(rsp
->DataLength
);
3245 * Mask off high 16 bits when bytes written as returned
3246 * by the server is greater than bytes requested by the
3247 * client. OS/2 servers are known to set incorrect
3250 if (written
> wdata
->bytes
)
3253 if (written
< wdata
->bytes
)
3254 wdata
->result
= -ENOSPC
;
3256 wdata
->bytes
= written
;
3258 case MID_REQUEST_SUBMITTED
:
3259 case MID_RETRY_NEEDED
:
3260 wdata
->result
= -EAGAIN
;
3263 wdata
->result
= -EIO
;
3266 #ifdef CONFIG_CIFS_SMB_DIRECT
3268 * If this wdata has a memory registered, the MR can be freed
3269 * The number of MRs available is limited, it's important to recover
3270 * used MR as soon as I/O is finished. Hold MR longer in the later
3271 * I/O process can possibly result in I/O deadlock due to lack of MR
3272 * to send request on I/O retry
3275 smbd_deregister_mr(wdata
->mr
);
3280 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3282 queue_work(cifsiod_wq
, &wdata
->work
);
3283 DeleteMidQEntry(mid
);
3284 add_credits(tcon
->ses
->server
, credits_received
, 0);
3287 /* smb2_async_writev - send an async write, and set up mid to handle result */
3289 smb2_async_writev(struct cifs_writedata
*wdata
,
3290 void (*release
)(struct kref
*kref
))
3292 int rc
= -EACCES
, flags
= 0;
3293 struct smb2_write_req
*req
= NULL
;
3294 struct smb2_sync_hdr
*shdr
;
3295 struct cifs_tcon
*tcon
= tlink_tcon(wdata
->cfile
->tlink
);
3296 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
3298 struct smb_rqst rqst
= { };
3299 unsigned int total_len
;
3301 rc
= smb2_plain_req_init(SMB2_WRITE
, tcon
, (void **) &req
, &total_len
);
3303 if (rc
== -EAGAIN
&& wdata
->credits
) {
3304 /* credits was reset by reconnect */
3306 /* reduce in_flight value since we won't send the req */
3307 spin_lock(&server
->req_lock
);
3308 server
->in_flight
--;
3309 spin_unlock(&server
->req_lock
);
3311 goto async_writev_out
;
3314 if (smb3_encryption_required(tcon
))
3315 flags
|= CIFS_TRANSFORM_REQ
;
3317 shdr
= (struct smb2_sync_hdr
*)req
;
3318 shdr
->ProcessId
= cpu_to_le32(wdata
->cfile
->pid
);
3320 req
->PersistentFileId
= wdata
->cfile
->fid
.persistent_fid
;
3321 req
->VolatileFileId
= wdata
->cfile
->fid
.volatile_fid
;
3322 req
->WriteChannelInfoOffset
= 0;
3323 req
->WriteChannelInfoLength
= 0;
3325 req
->Offset
= cpu_to_le64(wdata
->offset
);
3326 req
->DataOffset
= cpu_to_le16(
3327 offsetof(struct smb2_write_req
, Buffer
));
3328 req
->RemainingBytes
= 0;
3329 #ifdef CONFIG_CIFS_SMB_DIRECT
3331 * If we want to do a server RDMA read, fill in and append
3332 * smbd_buffer_descriptor_v1 to the end of write request
3334 if (server
->rdma
&& !server
->sign
&& wdata
->bytes
>=
3335 server
->smbd_conn
->rdma_readwrite_threshold
) {
3337 struct smbd_buffer_descriptor_v1
*v1
;
3338 bool need_invalidate
= server
->dialect
== SMB30_PROT_ID
;
3340 wdata
->mr
= smbd_register_mr(
3341 server
->smbd_conn
, wdata
->pages
,
3342 wdata
->nr_pages
, wdata
->page_offset
,
3343 wdata
->tailsz
, false, need_invalidate
);
3346 goto async_writev_out
;
3349 req
->DataOffset
= 0;
3350 if (wdata
->nr_pages
> 1)
3351 req
->RemainingBytes
=
3353 (wdata
->nr_pages
- 1) * wdata
->pagesz
-
3354 wdata
->page_offset
+ wdata
->tailsz
3357 req
->RemainingBytes
= cpu_to_le32(wdata
->tailsz
);
3358 req
->Channel
= SMB2_CHANNEL_RDMA_V1_INVALIDATE
;
3359 if (need_invalidate
)
3360 req
->Channel
= SMB2_CHANNEL_RDMA_V1
;
3361 req
->WriteChannelInfoOffset
=
3362 cpu_to_le16(offsetof(struct smb2_write_req
, Buffer
));
3363 req
->WriteChannelInfoLength
=
3364 cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1
));
3365 v1
= (struct smbd_buffer_descriptor_v1
*) &req
->Buffer
[0];
3366 v1
->offset
= cpu_to_le64(wdata
->mr
->mr
->iova
);
3367 v1
->token
= cpu_to_le32(wdata
->mr
->mr
->rkey
);
3368 v1
->length
= cpu_to_le32(wdata
->mr
->mr
->length
);
3371 iov
[0].iov_len
= total_len
- 1;
3372 iov
[0].iov_base
= (char *)req
;
3376 rqst
.rq_pages
= wdata
->pages
;
3377 rqst
.rq_offset
= wdata
->page_offset
;
3378 rqst
.rq_npages
= wdata
->nr_pages
;
3379 rqst
.rq_pagesz
= wdata
->pagesz
;
3380 rqst
.rq_tailsz
= wdata
->tailsz
;
3381 #ifdef CONFIG_CIFS_SMB_DIRECT
3383 iov
[0].iov_len
+= sizeof(struct smbd_buffer_descriptor_v1
);
3387 cifs_dbg(FYI
, "async write at %llu %u bytes\n",
3388 wdata
->offset
, wdata
->bytes
);
3390 #ifdef CONFIG_CIFS_SMB_DIRECT
3391 /* For RDMA read, I/O size is in RemainingBytes not in Length */
3393 req
->Length
= cpu_to_le32(wdata
->bytes
);
3395 req
->Length
= cpu_to_le32(wdata
->bytes
);
3398 if (wdata
->credits
) {
3399 shdr
->CreditCharge
= cpu_to_le16(DIV_ROUND_UP(wdata
->bytes
,
3400 SMB2_MAX_BUFFER_SIZE
));
3401 shdr
->CreditRequest
= shdr
->CreditCharge
;
3402 spin_lock(&server
->req_lock
);
3403 server
->credits
+= wdata
->credits
-
3404 le16_to_cpu(shdr
->CreditCharge
);
3405 spin_unlock(&server
->req_lock
);
3406 wake_up(&server
->request_q
);
3407 flags
|= CIFS_HAS_CREDITS
;
3410 kref_get(&wdata
->refcount
);
3411 rc
= cifs_call_async(server
, &rqst
, NULL
, smb2_writev_callback
, NULL
,
3415 trace_smb3_write_err(0 /* no xid */, req
->PersistentFileId
,
3416 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3418 kref_put(&wdata
->refcount
, release
);
3419 cifs_stats_fail_inc(tcon
, SMB2_WRITE_HE
);
3421 trace_smb3_write_done(0 /* no xid */, req
->PersistentFileId
,
3422 tcon
->tid
, tcon
->ses
->Suid
, wdata
->offset
,
3426 cifs_small_buf_release(req
);
3431 * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
3432 * The length field from io_parms must be at least 1 and indicates a number of
3433 * elements with data to write that begins with position 1 in iov array. All
3434 * data length is specified by count.
3437 SMB2_write(const unsigned int xid
, struct cifs_io_parms
*io_parms
,
3438 unsigned int *nbytes
, struct kvec
*iov
, int n_vec
)
3440 struct smb_rqst rqst
;
3442 struct smb2_write_req
*req
= NULL
;
3443 struct smb2_write_rsp
*rsp
= NULL
;
3445 struct kvec rsp_iov
;
3447 unsigned int total_len
;
3454 rc
= smb2_plain_req_init(SMB2_WRITE
, io_parms
->tcon
, (void **) &req
,
3459 if (io_parms
->tcon
->ses
->server
== NULL
)
3460 return -ECONNABORTED
;
3462 if (smb3_encryption_required(io_parms
->tcon
))
3463 flags
|= CIFS_TRANSFORM_REQ
;
3465 req
->sync_hdr
.ProcessId
= cpu_to_le32(io_parms
->pid
);
3467 req
->PersistentFileId
= io_parms
->persistent_fid
;
3468 req
->VolatileFileId
= io_parms
->volatile_fid
;
3469 req
->WriteChannelInfoOffset
= 0;
3470 req
->WriteChannelInfoLength
= 0;
3472 req
->Length
= cpu_to_le32(io_parms
->length
);
3473 req
->Offset
= cpu_to_le64(io_parms
->offset
);
3474 req
->DataOffset
= cpu_to_le16(
3475 offsetof(struct smb2_write_req
, Buffer
));
3476 req
->RemainingBytes
= 0;
3478 iov
[0].iov_base
= (char *)req
;
3480 iov
[0].iov_len
= total_len
- 1;
3482 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3484 rqst
.rq_nvec
= n_vec
+ 1;
3486 rc
= cifs_send_recv(xid
, io_parms
->tcon
->ses
, &rqst
,
3487 &resp_buftype
, flags
, &rsp_iov
);
3488 cifs_small_buf_release(req
);
3489 rsp
= (struct smb2_write_rsp
*)rsp_iov
.iov_base
;
3492 trace_smb3_write_err(xid
, req
->PersistentFileId
,
3493 io_parms
->tcon
->tid
,
3494 io_parms
->tcon
->ses
->Suid
,
3495 io_parms
->offset
, io_parms
->length
, rc
);
3496 cifs_stats_fail_inc(io_parms
->tcon
, SMB2_WRITE_HE
);
3497 cifs_dbg(VFS
, "Send error in write = %d\n", rc
);
3499 *nbytes
= le32_to_cpu(rsp
->DataLength
);
3500 trace_smb3_write_done(xid
, req
->PersistentFileId
,
3501 io_parms
->tcon
->tid
,
3502 io_parms
->tcon
->ses
->Suid
,
3503 io_parms
->offset
, *nbytes
);
3506 free_rsp_buf(resp_buftype
, rsp
);
3511 num_entries(char *bufstart
, char *end_of_buf
, char **lastentry
, size_t size
)
3514 unsigned int entrycount
= 0;
3515 unsigned int next_offset
= 0;
3516 FILE_DIRECTORY_INFO
*entryptr
;
3518 if (bufstart
== NULL
)
3521 entryptr
= (FILE_DIRECTORY_INFO
*)bufstart
;
3524 entryptr
= (FILE_DIRECTORY_INFO
*)
3525 ((char *)entryptr
+ next_offset
);
3527 if ((char *)entryptr
+ size
> end_of_buf
) {
3528 cifs_dbg(VFS
, "malformed search entry would overflow\n");
3532 len
= le32_to_cpu(entryptr
->FileNameLength
);
3533 if ((char *)entryptr
+ len
+ size
> end_of_buf
) {
3534 cifs_dbg(VFS
, "directory entry name would overflow frame end of buf %p\n",
3539 *lastentry
= (char *)entryptr
;
3542 next_offset
= le32_to_cpu(entryptr
->NextEntryOffset
);
3554 SMB2_query_directory(const unsigned int xid
, struct cifs_tcon
*tcon
,
3555 u64 persistent_fid
, u64 volatile_fid
, int index
,
3556 struct cifs_search_info
*srch_inf
)
3558 struct smb_rqst rqst
;
3559 struct smb2_query_directory_req
*req
;
3560 struct smb2_query_directory_rsp
*rsp
= NULL
;
3562 struct kvec rsp_iov
;
3565 int resp_buftype
= CIFS_NO_BUFFER
;
3566 unsigned char *bufptr
;
3567 struct TCP_Server_Info
*server
;
3568 struct cifs_ses
*ses
= tcon
->ses
;
3569 __le16 asteriks
= cpu_to_le16('*');
3571 unsigned int output_size
= CIFSMaxBufSize
;
3572 size_t info_buf_size
;
3574 unsigned int total_len
;
3576 if (ses
&& (ses
->server
))
3577 server
= ses
->server
;
3581 rc
= smb2_plain_req_init(SMB2_QUERY_DIRECTORY
, tcon
, (void **) &req
,
3586 if (smb3_encryption_required(tcon
))
3587 flags
|= CIFS_TRANSFORM_REQ
;
3589 switch (srch_inf
->info_level
) {
3590 case SMB_FIND_FILE_DIRECTORY_INFO
:
3591 req
->FileInformationClass
= FILE_DIRECTORY_INFORMATION
;
3592 info_buf_size
= sizeof(FILE_DIRECTORY_INFO
) - 1;
3594 case SMB_FIND_FILE_ID_FULL_DIR_INFO
:
3595 req
->FileInformationClass
= FILEID_FULL_DIRECTORY_INFORMATION
;
3596 info_buf_size
= sizeof(SEARCH_ID_FULL_DIR_INFO
) - 1;
3599 cifs_dbg(VFS
, "info level %u isn't supported\n",
3600 srch_inf
->info_level
);
3605 req
->FileIndex
= cpu_to_le32(index
);
3606 req
->PersistentFileId
= persistent_fid
;
3607 req
->VolatileFileId
= volatile_fid
;
3610 bufptr
= req
->Buffer
;
3611 memcpy(bufptr
, &asteriks
, len
);
3613 req
->FileNameOffset
=
3614 cpu_to_le16(sizeof(struct smb2_query_directory_req
) - 1);
3615 req
->FileNameLength
= cpu_to_le16(len
);
3617 * BB could be 30 bytes or so longer if we used SMB2 specific
3618 * buffer lengths, but this is safe and close enough.
3620 output_size
= min_t(unsigned int, output_size
, server
->maxBuf
);
3621 output_size
= min_t(unsigned int, output_size
, 2 << 15);
3622 req
->OutputBufferLength
= cpu_to_le32(output_size
);
3624 iov
[0].iov_base
= (char *)req
;
3626 iov
[0].iov_len
= total_len
- 1;
3628 iov
[1].iov_base
= (char *)(req
->Buffer
);
3629 iov
[1].iov_len
= len
;
3631 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3635 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
3636 cifs_small_buf_release(req
);
3637 rsp
= (struct smb2_query_directory_rsp
*)rsp_iov
.iov_base
;
3640 if (rc
== -ENODATA
&&
3641 rsp
->sync_hdr
.Status
== STATUS_NO_MORE_FILES
) {
3642 srch_inf
->endOfSearch
= true;
3645 cifs_stats_fail_inc(tcon
, SMB2_QUERY_DIRECTORY_HE
);
3649 rc
= validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
3650 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
3655 srch_inf
->unicode
= true;
3657 if (srch_inf
->ntwrk_buf_start
) {
3658 if (srch_inf
->smallBuf
)
3659 cifs_small_buf_release(srch_inf
->ntwrk_buf_start
);
3661 cifs_buf_release(srch_inf
->ntwrk_buf_start
);
3663 srch_inf
->ntwrk_buf_start
= (char *)rsp
;
3664 srch_inf
->srch_entries_start
= srch_inf
->last_entry
=
3665 (char *)rsp
+ le16_to_cpu(rsp
->OutputBufferOffset
);
3666 end_of_smb
= rsp_iov
.iov_len
+ (char *)rsp
;
3667 srch_inf
->entries_in_buffer
=
3668 num_entries(srch_inf
->srch_entries_start
, end_of_smb
,
3669 &srch_inf
->last_entry
, info_buf_size
);
3670 srch_inf
->index_of_last_entry
+= srch_inf
->entries_in_buffer
;
3671 cifs_dbg(FYI
, "num entries %d last_index %lld srch start %p srch end %p\n",
3672 srch_inf
->entries_in_buffer
, srch_inf
->index_of_last_entry
,
3673 srch_inf
->srch_entries_start
, srch_inf
->last_entry
);
3674 if (resp_buftype
== CIFS_LARGE_BUFFER
)
3675 srch_inf
->smallBuf
= false;
3676 else if (resp_buftype
== CIFS_SMALL_BUFFER
)
3677 srch_inf
->smallBuf
= true;
3679 cifs_dbg(VFS
, "illegal search buffer type\n");
3684 free_rsp_buf(resp_buftype
, rsp
);
3689 send_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3690 u64 persistent_fid
, u64 volatile_fid
, u32 pid
, u8 info_class
,
3691 u8 info_type
, u32 additional_info
, unsigned int num
,
3692 void **data
, unsigned int *size
)
3694 struct smb_rqst rqst
;
3695 struct smb2_set_info_req
*req
;
3696 struct smb2_set_info_rsp
*rsp
= NULL
;
3698 struct kvec rsp_iov
;
3702 struct cifs_ses
*ses
= tcon
->ses
;
3704 unsigned int total_len
;
3706 if (!ses
|| !(ses
->server
))
3712 iov
= kmalloc_array(num
, sizeof(struct kvec
), GFP_KERNEL
);
3716 rc
= smb2_plain_req_init(SMB2_SET_INFO
, tcon
, (void **) &req
, &total_len
);
3722 if (smb3_encryption_required(tcon
))
3723 flags
|= CIFS_TRANSFORM_REQ
;
3725 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
3727 req
->InfoType
= info_type
;
3728 req
->FileInfoClass
= info_class
;
3729 req
->PersistentFileId
= persistent_fid
;
3730 req
->VolatileFileId
= volatile_fid
;
3731 req
->AdditionalInformation
= cpu_to_le32(additional_info
);
3734 cpu_to_le16(sizeof(struct smb2_set_info_req
) - 1);
3735 req
->BufferLength
= cpu_to_le32(*size
);
3737 memcpy(req
->Buffer
, *data
, *size
);
3740 iov
[0].iov_base
= (char *)req
;
3742 iov
[0].iov_len
= total_len
- 1;
3744 for (i
= 1; i
< num
; i
++) {
3745 le32_add_cpu(&req
->BufferLength
, size
[i
]);
3746 iov
[i
].iov_base
= (char *)data
[i
];
3747 iov
[i
].iov_len
= size
[i
];
3750 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3754 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
,
3756 cifs_buf_release(req
);
3757 rsp
= (struct smb2_set_info_rsp
*)rsp_iov
.iov_base
;
3760 cifs_stats_fail_inc(tcon
, SMB2_SET_INFO_HE
);
3761 trace_smb3_set_info_err(xid
, persistent_fid
, tcon
->tid
,
3762 ses
->Suid
, info_class
, (__u32
)info_type
, rc
);
3765 free_rsp_buf(resp_buftype
, rsp
);
3771 SMB2_rename(const unsigned int xid
, struct cifs_tcon
*tcon
,
3772 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3774 struct smb2_file_rename_info info
;
3776 unsigned int size
[2];
3778 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3780 data
= kmalloc_array(2, sizeof(void *), GFP_KERNEL
);
3784 info
.ReplaceIfExists
= 1; /* 1 = replace existing target with new */
3785 /* 0 = fail if target already exists */
3786 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3787 info
.FileNameLength
= cpu_to_le32(len
);
3790 size
[0] = sizeof(struct smb2_file_rename_info
);
3792 data
[1] = target_file
;
3793 size
[1] = len
+ 2 /* null */;
3795 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3796 current
->tgid
, FILE_RENAME_INFORMATION
, SMB2_O_INFO_FILE
,
3803 SMB2_rmdir(const unsigned int xid
, struct cifs_tcon
*tcon
,
3804 u64 persistent_fid
, u64 volatile_fid
)
3806 __u8 delete_pending
= 1;
3810 data
= &delete_pending
;
3811 size
= 1; /* sizeof __u8 */
3813 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3814 current
->tgid
, FILE_DISPOSITION_INFORMATION
, SMB2_O_INFO_FILE
,
3815 0, 1, &data
, &size
);
3819 SMB2_set_hardlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
3820 u64 persistent_fid
, u64 volatile_fid
, __le16
*target_file
)
3822 struct smb2_file_link_info info
;
3824 unsigned int size
[2];
3826 int len
= (2 * UniStrnlen((wchar_t *)target_file
, PATH_MAX
));
3828 data
= kmalloc_array(2, sizeof(void *), GFP_KERNEL
);
3832 info
.ReplaceIfExists
= 0; /* 1 = replace existing link with new */
3833 /* 0 = fail if link already exists */
3834 info
.RootDirectory
= 0; /* MBZ for network ops (why does spec say?) */
3835 info
.FileNameLength
= cpu_to_le32(len
);
3838 size
[0] = sizeof(struct smb2_file_link_info
);
3840 data
[1] = target_file
;
3841 size
[1] = len
+ 2 /* null */;
3843 rc
= send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3844 current
->tgid
, FILE_LINK_INFORMATION
, SMB2_O_INFO_FILE
,
3851 SMB2_set_eof(const unsigned int xid
, struct cifs_tcon
*tcon
, u64 persistent_fid
,
3852 u64 volatile_fid
, u32 pid
, __le64
*eof
, bool is_falloc
)
3854 struct smb2_file_eof_info info
;
3858 info
.EndOfFile
= *eof
;
3861 size
= sizeof(struct smb2_file_eof_info
);
3864 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3865 pid
, FILE_ALLOCATION_INFORMATION
, SMB2_O_INFO_FILE
,
3866 0, 1, &data
, &size
);
3868 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3869 pid
, FILE_END_OF_FILE_INFORMATION
, SMB2_O_INFO_FILE
,
3870 0, 1, &data
, &size
);
3874 SMB2_set_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
3875 u64 persistent_fid
, u64 volatile_fid
, FILE_BASIC_INFO
*buf
)
3878 size
= sizeof(FILE_BASIC_INFO
);
3879 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3880 current
->tgid
, FILE_BASIC_INFORMATION
, SMB2_O_INFO_FILE
,
3881 0, 1, (void **)&buf
, &size
);
3885 SMB2_set_acl(const unsigned int xid
, struct cifs_tcon
*tcon
,
3886 u64 persistent_fid
, u64 volatile_fid
,
3887 struct cifs_ntsd
*pnntsd
, int pacllen
, int aclflag
)
3889 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3890 current
->tgid
, 0, SMB2_O_INFO_SECURITY
, aclflag
,
3891 1, (void **)&pnntsd
, &pacllen
);
3895 SMB2_set_ea(const unsigned int xid
, struct cifs_tcon
*tcon
,
3896 u64 persistent_fid
, u64 volatile_fid
,
3897 struct smb2_file_full_ea_info
*buf
, int len
)
3899 return send_set_info(xid
, tcon
, persistent_fid
, volatile_fid
,
3900 current
->tgid
, FILE_FULL_EA_INFORMATION
, SMB2_O_INFO_FILE
,
3901 0, 1, (void **)&buf
, &len
);
3905 SMB2_oplock_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
3906 const u64 persistent_fid
, const u64 volatile_fid
,
3909 struct smb_rqst rqst
;
3911 struct smb2_oplock_break
*req
= NULL
;
3912 struct cifs_ses
*ses
= tcon
->ses
;
3913 int flags
= CIFS_OBREAK_OP
;
3914 unsigned int total_len
;
3916 struct kvec rsp_iov
;
3919 cifs_dbg(FYI
, "SMB2_oplock_break\n");
3920 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
3925 if (smb3_encryption_required(tcon
))
3926 flags
|= CIFS_TRANSFORM_REQ
;
3928 req
->VolatileFid
= volatile_fid
;
3929 req
->PersistentFid
= persistent_fid
;
3930 req
->OplockLevel
= oplock_level
;
3931 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
3933 flags
|= CIFS_NO_RESP
;
3935 iov
[0].iov_base
= (char *)req
;
3936 iov
[0].iov_len
= total_len
;
3938 memset(&rqst
, 0, sizeof(struct smb_rqst
));
3942 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
3943 cifs_small_buf_release(req
);
3946 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
3947 cifs_dbg(FYI
, "Send error in Oplock Break = %d\n", rc
);
3954 copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info
*pfs_inf
,
3955 struct kstatfs
*kst
)
3957 kst
->f_bsize
= le32_to_cpu(pfs_inf
->BytesPerSector
) *
3958 le32_to_cpu(pfs_inf
->SectorsPerAllocationUnit
);
3959 kst
->f_blocks
= le64_to_cpu(pfs_inf
->TotalAllocationUnits
);
3960 kst
->f_bfree
= kst
->f_bavail
=
3961 le64_to_cpu(pfs_inf
->CallerAvailableAllocationUnits
);
3966 copy_posix_fs_info_to_kstatfs(FILE_SYSTEM_POSIX_INFO
*response_data
,
3967 struct kstatfs
*kst
)
3969 kst
->f_bsize
= le32_to_cpu(response_data
->BlockSize
);
3970 kst
->f_blocks
= le64_to_cpu(response_data
->TotalBlocks
);
3971 kst
->f_bfree
= le64_to_cpu(response_data
->BlocksAvail
);
3972 if (response_data
->UserBlocksAvail
== cpu_to_le64(-1))
3973 kst
->f_bavail
= kst
->f_bfree
;
3975 kst
->f_bavail
= le64_to_cpu(response_data
->UserBlocksAvail
);
3976 if (response_data
->TotalFileNodes
!= cpu_to_le64(-1))
3977 kst
->f_files
= le64_to_cpu(response_data
->TotalFileNodes
);
3978 if (response_data
->FreeFileNodes
!= cpu_to_le64(-1))
3979 kst
->f_ffree
= le64_to_cpu(response_data
->FreeFileNodes
);
3985 build_qfs_info_req(struct kvec
*iov
, struct cifs_tcon
*tcon
, int level
,
3986 int outbuf_len
, u64 persistent_fid
, u64 volatile_fid
)
3988 struct TCP_Server_Info
*server
;
3990 struct smb2_query_info_req
*req
;
3991 unsigned int total_len
;
3993 cifs_dbg(FYI
, "Query FSInfo level %d\n", level
);
3995 if ((tcon
->ses
== NULL
) || (tcon
->ses
->server
== NULL
))
3998 server
= tcon
->ses
->server
;
4000 rc
= smb2_plain_req_init(SMB2_QUERY_INFO
, tcon
, (void **) &req
,
4005 req
->InfoType
= SMB2_O_INFO_FILESYSTEM
;
4006 req
->FileInfoClass
= level
;
4007 req
->PersistentFileId
= persistent_fid
;
4008 req
->VolatileFileId
= volatile_fid
;
4010 req
->InputBufferOffset
=
4011 cpu_to_le16(sizeof(struct smb2_query_info_req
) - 1);
4012 req
->OutputBufferLength
= cpu_to_le32(
4013 outbuf_len
+ sizeof(struct smb2_query_info_rsp
) - 1);
4015 iov
->iov_base
= (char *)req
;
4016 iov
->iov_len
= total_len
;
4021 SMB311_posix_qfs_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4022 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
4024 struct smb_rqst rqst
;
4025 struct smb2_query_info_rsp
*rsp
= NULL
;
4027 struct kvec rsp_iov
;
4030 struct cifs_ses
*ses
= tcon
->ses
;
4031 FILE_SYSTEM_POSIX_INFO
*info
= NULL
;
4034 rc
= build_qfs_info_req(&iov
, tcon
, FS_POSIX_INFORMATION
,
4035 sizeof(FILE_SYSTEM_POSIX_INFO
),
4036 persistent_fid
, volatile_fid
);
4040 if (smb3_encryption_required(tcon
))
4041 flags
|= CIFS_TRANSFORM_REQ
;
4043 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4047 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4048 cifs_small_buf_release(iov
.iov_base
);
4050 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4051 goto posix_qfsinf_exit
;
4053 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4055 info
= (FILE_SYSTEM_POSIX_INFO
*)(
4056 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
4057 rc
= validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4058 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
4059 sizeof(FILE_SYSTEM_POSIX_INFO
));
4061 copy_posix_fs_info_to_kstatfs(info
, fsdata
);
4064 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4069 SMB2_QFS_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
4070 u64 persistent_fid
, u64 volatile_fid
, struct kstatfs
*fsdata
)
4072 struct smb_rqst rqst
;
4073 struct smb2_query_info_rsp
*rsp
= NULL
;
4075 struct kvec rsp_iov
;
4078 struct cifs_ses
*ses
= tcon
->ses
;
4079 struct smb2_fs_full_size_info
*info
= NULL
;
4082 rc
= build_qfs_info_req(&iov
, tcon
, FS_FULL_SIZE_INFORMATION
,
4083 sizeof(struct smb2_fs_full_size_info
),
4084 persistent_fid
, volatile_fid
);
4088 if (smb3_encryption_required(tcon
))
4089 flags
|= CIFS_TRANSFORM_REQ
;
4091 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4095 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4096 cifs_small_buf_release(iov
.iov_base
);
4098 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4101 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4103 info
= (struct smb2_fs_full_size_info
*)(
4104 le16_to_cpu(rsp
->OutputBufferOffset
) + (char *)rsp
);
4105 rc
= validate_iov(le16_to_cpu(rsp
->OutputBufferOffset
),
4106 le32_to_cpu(rsp
->OutputBufferLength
), &rsp_iov
,
4107 sizeof(struct smb2_fs_full_size_info
));
4109 copy_fs_info_to_kstatfs(info
, fsdata
);
4112 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4117 SMB2_QFS_attr(const unsigned int xid
, struct cifs_tcon
*tcon
,
4118 u64 persistent_fid
, u64 volatile_fid
, int level
)
4120 struct smb_rqst rqst
;
4121 struct smb2_query_info_rsp
*rsp
= NULL
;
4123 struct kvec rsp_iov
;
4125 int resp_buftype
, max_len
, min_len
;
4126 struct cifs_ses
*ses
= tcon
->ses
;
4127 unsigned int rsp_len
, offset
;
4130 if (level
== FS_DEVICE_INFORMATION
) {
4131 max_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4132 min_len
= sizeof(FILE_SYSTEM_DEVICE_INFO
);
4133 } else if (level
== FS_ATTRIBUTE_INFORMATION
) {
4134 max_len
= sizeof(FILE_SYSTEM_ATTRIBUTE_INFO
);
4135 min_len
= MIN_FS_ATTR_INFO_SIZE
;
4136 } else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4137 max_len
= sizeof(struct smb3_fs_ss_info
);
4138 min_len
= sizeof(struct smb3_fs_ss_info
);
4139 } else if (level
== FS_VOLUME_INFORMATION
) {
4140 max_len
= sizeof(struct smb3_fs_vol_info
) + MAX_VOL_LABEL_LEN
;
4141 min_len
= sizeof(struct smb3_fs_vol_info
);
4143 cifs_dbg(FYI
, "Invalid qfsinfo level %d\n", level
);
4147 rc
= build_qfs_info_req(&iov
, tcon
, level
, max_len
,
4148 persistent_fid
, volatile_fid
);
4152 if (smb3_encryption_required(tcon
))
4153 flags
|= CIFS_TRANSFORM_REQ
;
4155 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4159 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buftype
, flags
, &rsp_iov
);
4160 cifs_small_buf_release(iov
.iov_base
);
4162 cifs_stats_fail_inc(tcon
, SMB2_QUERY_INFO_HE
);
4165 rsp
= (struct smb2_query_info_rsp
*)rsp_iov
.iov_base
;
4167 rsp_len
= le32_to_cpu(rsp
->OutputBufferLength
);
4168 offset
= le16_to_cpu(rsp
->OutputBufferOffset
);
4169 rc
= validate_iov(offset
, rsp_len
, &rsp_iov
, min_len
);
4173 if (level
== FS_ATTRIBUTE_INFORMATION
)
4174 memcpy(&tcon
->fsAttrInfo
, offset
4175 + (char *)rsp
, min_t(unsigned int,
4177 else if (level
== FS_DEVICE_INFORMATION
)
4178 memcpy(&tcon
->fsDevInfo
, offset
4179 + (char *)rsp
, sizeof(FILE_SYSTEM_DEVICE_INFO
));
4180 else if (level
== FS_SECTOR_SIZE_INFORMATION
) {
4181 struct smb3_fs_ss_info
*ss_info
= (struct smb3_fs_ss_info
*)
4182 (offset
+ (char *)rsp
);
4183 tcon
->ss_flags
= le32_to_cpu(ss_info
->Flags
);
4184 tcon
->perf_sector_size
=
4185 le32_to_cpu(ss_info
->PhysicalBytesPerSectorForPerf
);
4186 } else if (level
== FS_VOLUME_INFORMATION
) {
4187 struct smb3_fs_vol_info
*vol_info
= (struct smb3_fs_vol_info
*)
4188 (offset
+ (char *)rsp
);
4189 tcon
->vol_serial_number
= vol_info
->VolumeSerialNumber
;
4190 tcon
->vol_create_time
= vol_info
->VolumeCreationTime
;
4194 free_rsp_buf(resp_buftype
, rsp_iov
.iov_base
);
4199 smb2_lockv(const unsigned int xid
, struct cifs_tcon
*tcon
,
4200 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4201 const __u32 num_lock
, struct smb2_lock_element
*buf
)
4203 struct smb_rqst rqst
;
4205 struct smb2_lock_req
*req
= NULL
;
4207 struct kvec rsp_iov
;
4210 int flags
= CIFS_NO_RESP
;
4211 unsigned int total_len
;
4213 cifs_dbg(FYI
, "smb2_lockv num lock %d\n", num_lock
);
4215 rc
= smb2_plain_req_init(SMB2_LOCK
, tcon
, (void **) &req
, &total_len
);
4219 if (smb3_encryption_required(tcon
))
4220 flags
|= CIFS_TRANSFORM_REQ
;
4222 req
->sync_hdr
.ProcessId
= cpu_to_le32(pid
);
4223 req
->LockCount
= cpu_to_le16(num_lock
);
4225 req
->PersistentFileId
= persist_fid
;
4226 req
->VolatileFileId
= volatile_fid
;
4228 count
= num_lock
* sizeof(struct smb2_lock_element
);
4230 iov
[0].iov_base
= (char *)req
;
4231 iov
[0].iov_len
= total_len
- sizeof(struct smb2_lock_element
);
4232 iov
[1].iov_base
= (char *)buf
;
4233 iov
[1].iov_len
= count
;
4235 cifs_stats_inc(&tcon
->stats
.cifs_stats
.num_locks
);
4237 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4241 rc
= cifs_send_recv(xid
, tcon
->ses
, &rqst
, &resp_buf_type
, flags
,
4243 cifs_small_buf_release(req
);
4245 cifs_dbg(FYI
, "Send error in smb2_lockv = %d\n", rc
);
4246 cifs_stats_fail_inc(tcon
, SMB2_LOCK_HE
);
4247 trace_smb3_lock_err(xid
, persist_fid
, tcon
->tid
,
4248 tcon
->ses
->Suid
, rc
);
4255 SMB2_lock(const unsigned int xid
, struct cifs_tcon
*tcon
,
4256 const __u64 persist_fid
, const __u64 volatile_fid
, const __u32 pid
,
4257 const __u64 length
, const __u64 offset
, const __u32 lock_flags
,
4260 struct smb2_lock_element lock
;
4262 lock
.Offset
= cpu_to_le64(offset
);
4263 lock
.Length
= cpu_to_le64(length
);
4264 lock
.Flags
= cpu_to_le32(lock_flags
);
4265 if (!wait
&& lock_flags
!= SMB2_LOCKFLAG_UNLOCK
)
4266 lock
.Flags
|= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY
);
4268 return smb2_lockv(xid
, tcon
, persist_fid
, volatile_fid
, pid
, 1, &lock
);
4272 SMB2_lease_break(const unsigned int xid
, struct cifs_tcon
*tcon
,
4273 __u8
*lease_key
, const __le32 lease_state
)
4275 struct smb_rqst rqst
;
4277 struct smb2_lease_ack
*req
= NULL
;
4278 struct cifs_ses
*ses
= tcon
->ses
;
4279 int flags
= CIFS_OBREAK_OP
;
4280 unsigned int total_len
;
4282 struct kvec rsp_iov
;
4285 cifs_dbg(FYI
, "SMB2_lease_break\n");
4286 rc
= smb2_plain_req_init(SMB2_OPLOCK_BREAK
, tcon
, (void **) &req
,
4291 if (smb3_encryption_required(tcon
))
4292 flags
|= CIFS_TRANSFORM_REQ
;
4294 req
->sync_hdr
.CreditRequest
= cpu_to_le16(1);
4295 req
->StructureSize
= cpu_to_le16(36);
4298 memcpy(req
->LeaseKey
, lease_key
, 16);
4299 req
->LeaseState
= lease_state
;
4301 flags
|= CIFS_NO_RESP
;
4303 iov
[0].iov_base
= (char *)req
;
4304 iov
[0].iov_len
= total_len
;
4306 memset(&rqst
, 0, sizeof(struct smb_rqst
));
4310 rc
= cifs_send_recv(xid
, ses
, &rqst
, &resp_buf_type
, flags
, &rsp_iov
);
4311 cifs_small_buf_release(req
);
4314 cifs_stats_fail_inc(tcon
, SMB2_OPLOCK_BREAK_HE
);
4315 cifs_dbg(FYI
, "Send error in Lease Break = %d\n", rc
);